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MVA, also known as "mini-suction" and "menstrual extraction", or EVA can be used in very early pregnancy when cervical dilation may not be required. Dilation and curettage (D&C) refers to opening the cervix (dilation) and removing tissue (curettage) via suction or sharp instruments. D&C is a standard gynecologi...
First trimester procedures can generally be performed using local anesthesia, while second trimester methods may require deep sedation or general anesthesia. Labor induction abortion. In places lacking the necessary medical skill for dilation and extraction, or when preferred by practitioners, an abortion can be induce...
Other methods. Historically, a number of herbs reputed to possess abortifacient properties have been used in folk medicine. Such herbs include tansy, pennyroyal, black cohosh, and the now-extinct silphium. In 1978, one woman in Colorado died and another developed organ damage when they attempted to terminate their preg...
Safety. The health risks of abortion depend principally on how, and under what conditions, the procedure is performed. The World Health Organization (WHO) defines unsafe abortions as those performed by unskilled individuals, with hazardous equipment, or in unsanitary facilities. Legal abortions performed in the develop...
In the US from 2000 to 2009, abortion had a mortality rate lower than plastic surgery, lower or similar to running a marathon, and about equivalent to traveling in a passenger car. Five years after seeking abortion services, women who gave birth after being denied an abortion reported worse health than women who had ei...
Safety and gestational age. Vacuum aspiration in the first trimester is the safest method of surgical abortion, and can be performed in a primary care office, abortion clinic, or hospital. Complications, which are rare, can include uterine perforation, pelvic infection, and retained products of conception requiring a s...
Complications after second trimester abortion are similar to those after first trimester abortion, and depend somewhat on the method chosen. The risk of death from abortion approaches roughly half the risk of death from childbirth the farther along a woman is in pregnancy; from one in a million before 9 weeks gestation...
Although some studies show negative mental-health outcomes in women who choose abortions after the first trimester because of fetal abnormalities, more rigorous research would be needed to show this conclusively. Some proposed negative psychological effects of abortion have been referred to by anti-abortion advocates a...
but lack scientific support. For example, the question of a link between induced abortion and breast cancer has been investigated extensively. Major medical and scientific bodies (including the WHO, National Cancer Institute, American Cancer Society, Royal College of OBGYN and American Congress of OBGYN) have concluded...
Unsafe abortion. Women seeking an abortion may use unsafe methods, especially when abortion is legally restricted. They may attempt self-induced abortion or seek the help of a person without proper medical training or facilities. This can lead to severe complications, such as incomplete abortion, sepsis, hemorrhage, an...
A major factor in whether abortions are performed safely or not is the legal standing of abortion. Countries with restrictive abortion laws have higher rates of unsafe abortion and similar overall abortion rates compared to countries where abortion is legal and available. For example, the 1996 legalization of abortion ...
Forty percent of the world's women are able to access therapeutic and elective abortions within gestational limits, while an additional 35 percent have access to legal abortion if they meet certain physical, mental, or socioeconomic criteria. While maternal mortality seldom results from safe abortions, unsafe abortions...
On average, the incidence of abortion is similar in countries with restrictive abortion laws and those with more liberal access to abortion. Restrictive abortion laws are associated with increases in the percentage of abortions performed unsafely. The unsafe abortion rate in developing countries is partly attributable ...
An American study in 2002 concluded that about half of women having abortions were using a form of contraception at the time of becoming pregnant. Inconsistent use was reported by half of those using condoms and three-quarters of those using the birth control pill; 42% of those using condoms reported failure through sl...
Gestational age and method. Abortion rates vary depending on the stage of pregnancy and the method practiced. In 2003, the Centers for Disease Control and Prevention (CDC) reported that 26% of reported legal induced abortions in the United States were known to have been obtained at the end of 6 weeks of gestation or le...
The Guttmacher Institute estimated there were 2,200 intact dilation and extraction procedures in the US during 2000; this accounts for <0.2% of the total number of abortions performed that year. Similarly, in England and Wales in 2006, 89% of terminations occurred at or under 12 weeks, 9% between 13 and 19 weeks, an...
Medical reasons for seeking an abortion later in pregnancy include fetal anomalies and health risk to the pregnant person. There are prenatal tests that can diagnose Down Syndrome or cystic fibrosis as early as 10 weeks into gestation, but structural fetal anomalies are often detected much later in pregnancy. A proport...
Societal. Some abortions are undergone as the result of societal pressures. These might include the preference for children of a specific sex or race, disapproval of single or early motherhood, stigmatization of people with disabilities, insufficient economic support for families, lack of access to or rejection of cont...
Cancer. The rate of cancer during pregnancy is 0.02–1%, and in many cases, cancer of the mother leads to consideration of abortion to protect the life of the mother, or in response to the potential damage that may occur to the fetus during treatment. This is particularly true for cervical cancer, the most common type o...
The process of birth itself may also put the mother at risk. According to Li "et al.", "[v]aginal delivery may result in dissemination of neoplastic cells into lymphovascular channels, haemorrhage, cervical laceration and implantation of malignant cells in the episiotomy site, while abdominal delivery may delay the ini...
History. Since ancient times, abortions have been done using a number of methods, including herbal medicines acting as abortifacients, sharp tools through the use of force, or through other traditional medicine methods. Induced abortion has a long history and can be traced back to civilizations as varied as ancient Chi...
Some 19th-century physicians, argued for anti-abortion laws on racist and misogynist as well as moral grounds. Church groups were also highly influential in anti-abortion movements, and religious groups more so since the 20th century. Some of the early anti-abortion laws punished only the doctor or abortionist, and whi...
Religion. In Judaism, the fetus is not considered to have a human soul until it is safely outside of the woman, is viable, and has taken its first breath. The fetus is considered valuable property of the woman and not a human life while in the womb (Exodus 21:22-23). While Judaism encourages people to be fruitful and m...
Denominations that support abortion rights with some limits include the United Methodist Church, Episcopal Church, Evangelical Lutheran Church in America and Presbyterian Church USA. A 2014 Guttmacher survey of abortion patients in the United States found that many reported a religious affiliation: 24% were Catholic wh...
In both public and private debate, arguments presented in favor of or against abortion access focus on either the moral permissibility of an induced abortion, or the justification of laws permitting or restricting abortion. The World Medical Association Declaration on Therapeutic Abortion notes, "circumstances bringing...
In jurisdictions where abortion is legal, certain requirements must often be met before a woman may obtain a legal abortion (an abortion performed without the woman's consent is considered feticide and is generally illegal). These requirements usually depend on the age of the fetus, often using a trimester-based system...
Other jurisdictions ban abortion almost entirely. Many, but not all, of these allow legal abortions in a variety of circumstances. These circumstances vary based on jurisdiction, but may include whether the pregnancy is a result of rape or incest, the fetus' development is impaired, the woman's physical or mental well-...
Sex-selective abortion. Sonography and amniocentesis allow parents to determine sex before childbirth. The development of this technology has led to sex-selective abortion, or the termination of a fetus based on its sex. The selective termination of a female fetus is most common. Sex-selective abortion is partially res...
Anti-abortion violence. Abortion providers and facilities have been subjected to violence, including murder, assault, arson, and bombing. Some scholars consider anti-abortion violence to be within the definition of terrorism, a view shared by some governments. In the U.S. and Canada, over 8,000 incidents of violence, t...
Some countries have laws to protecting access to abortion. Such laws prevent abortion opponents from interfering with access to legal abortion services. For example, the American Freedom of Access to Clinic Entrances Act bars the use of threats or violence to interfere with abortion access. Abortion access laws may al...
Viral infection can cause abortion in dogs. Cats can experience spontaneous abortion for many reasons, including hormonal imbalance. A combined abortion and spaying is performed on pregnant cats, especially in trap–neuter–return programs, to prevent unwanted kittens from being born. Female rodents may terminate a pregn...
Abstract (law) In law, an abstract is a brief statement that contains the most important points of a long legal document or of several related legal papers. Types of legislation. The abstract of title, used in real estate transactions, is the more common form of abstract. An abstract of title lists all the owners of a...
American Revolutionary War The American Revolutionary War (April 19, 1775 – September 3, 1783), also known as the Revolutionary War or American War of Independence, was the armed conflict that comprised the final eight years of the broader American Revolution, in which American Patriot forces organized as the Continent...
In March 1776, in an early win for the newly-formed Continental Army under Washington's command, following a successful siege of Boston, the Continental Army successfully drove the British Army out of Boston. British commander in chief William Howe responded by launching the New York and New Jersey campaign, which resu...
Howe's replacement Henry Clinton intended to take the war against the Americans into the Southern Colonies. Despite some initial success, British General Cornwallis was besieged by a Franco-American force in Yorktown in September and October 1781. Cornwallis was forced to surrender in October. The British wars with Fra...
Taxation and legislation. The huge debt incurred by the Seven Years' War and demands from British taxpayers for cuts in government expenditure meant Parliament expected the colonies to fund their own defense. The 1763 to 1765 Grenville ministry instructed the Royal Navy to cease trading smuggled goods and enforce custo...
However, this did little to end the discontent; in 1768, a riot started in Boston when the authorities seized the sloop "Liberty" on suspicion of smuggling. Tensions escalated in March 1770 when British troops fired on rock-throwing civilians, killing five in what became known as the Boston Massacre. The Massacre coinc...
Break with the British Crown. Throughout the 18th century, the elected lower houses in the colonial legislatures gradually wrested power from their governors. Dominated by smaller landowners and merchants, these assemblies now established ad-hoc provincial legislatures, effectively replacing royal control. With the exc...
Political reactions. After the Patriot victory at Concord, moderates in Congress led by John Dickinson drafted the Olive Branch Petition, offering to accept royal authority in return for George III mediating in the dispute. However, since the petition was immediately followed by the Declaration of the Causes and Necess...
Declaration of Independence. Support for independence was boosted by Thomas Paine's pamphlet "Common Sense", which was published on January 10, 1776, and argued for American self-government and was widely reprinted. To draft the Declaration of Independence, the Second Continental Congress appointed the Committee of Fiv...
At the onset of the war, the Second Continental Congress realized defeating Britain required foreign alliances and intelligence-gathering. The Committee of Secret Correspondence was formed for "the sole purpose of corresponding with our friends in Great Britain and other parts of the world". From 1775 to 1776, the comm...
In May 1775, 4,500 British reinforcements arrived under Generals William Howe, John Burgoyne, and Sir Henry Clinton. On June 17, they seized the Charlestown Peninsula at the Battle of Bunker Hill, a frontal assault in which they suffered over 1,000 casualties. Dismayed at the costly attack which had gained them little,...
Beginning in August 1775, American privateers raided towns in Nova Scotia, including Saint John, Charlottetown, and Yarmouth. In 1776, John Paul Jones and Jonathan Eddy attacked Canso and Fort Cumberland respectively. British officials in Quebec began negotiating with the Iroquois for their support, while US envoys urg...
In Virginia, Dunmore's Proclamation on November 7, 1775, promised freedom to any slaves who fled their Patriot masters and agreed to fight for the Crown. British forces were defeated at Great Bridge on December 9 and took refuge on British ships anchored near Norfolk. When the Third Virginia Convention refused to disba...
British New York counter-offensive. After regrouping at Halifax in Nova Scotia, Howe set sail for New York in June 1776 and began landing troops on Staten Island near the entrance to New York Harbor on July 2. The Americans rejected Howe's informal attempt to negotiate peace on July 30; Washington knew that an attack o...
Washington split the Continental Army into positions on Manhattan and across the East River in western Long Island. On August 27 at the Battle of Long Island, Howe outflanked Washington and forced him back to Brooklyn Heights, but he did not attempt to encircle Washington's forces. Through the night of August 28, Knox ...
Washington's retreat isolated his remaining forces and the British captured Fort Washington on November 16. The British victory there amounted to Washington's most disastrous defeat with the loss of 3,000 prisoners. The remaining American regiments on Long Island fell back four days later. General Henry Clinton wanted ...
In London, news of the victorious Long Island campaign was well received with festivities held in the capital. Public support reached a peak. Strategic deficiencies among Patriot forces were evident: Washington divided a numerically weaker army in the face of a stronger one, his inexperienced staff misread the military...
The Battle of Trenton restored the American army's morale, reinvigorated the Patriot cause, and dispelled their fear of what they regarded as Hessian "mercenaries". A British attempt to retake Trenton was repulsed at Assunpink Creek on January 2; during the night, Washington outmaneuvered Cornwallis, then defeated his ...
With a mixed force of British regulars, professional German soldiers and Canadian militia Burgoyne set out on June 14, 1777, and captured Fort Ticonderoga on July 5. As General Horatio Gates retreated, his troops blocked roads, destroyed bridges, dammed streams, and stripped the area of food. This slowed Burgoyne's pro...
After securing additional supplies, Howe made another attempt on Philadelphia by landing his troops in Chesapeake Bay on August 24. He now compounded failure to support Burgoyne by missing repeated opportunities to destroy his opponent: despite defeating Washington at the Battle of Brandywine on September 11, he then a...
On December 19, the Americans followed suit and entered winter quarters at Valley Forge. As Washington's domestic opponents contrasted his lack of battlefield success with Gates' victory at Saratoga, foreign observers such as Frederick the Great were equally impressed with Washington's command at Germantown, which demo...
Many Americans opposed a French alliance, fearing to "exchange one tyranny for another", but this changed after a series of military setbacks in early 1776. As France had nothing to gain from the colonies reconciling with Britain, Congress had three choices: making peace on British terms, continuing the struggle on the...
On February 6, 1778, France and the United States signed the Treaty of Amity and Commerce regulating trade between the two countries, followed by a defensive military alliance against Britain, the Treaty of Alliance. In return for French guarantees of American independence, Congress undertook to defend their interests ...
To encourage French participation in the struggle for independence, the U.S. representative in Paris, Silas Deane promised promotion and command positions to any French officer who joined the Continental Army. Such as Gilbert du Motier, Marquis de Lafayette, whom Congress via Dean appointed a major general, on July 31,...
Meanwhile, George III had given up on subduing America while Britain had a European war to fight. He did not welcome war with France, but he held the British victories over France in the Seven Years' War as a reason to believe in ultimate victory over France. Britain subsequently changed its focus into the Caribbean th...
Further activity was limited to British raids on Chestnut Neck and Little Egg Harbor in October. In July 1779, the Americans captured British positions at Stony Point and Paulus Hook. Clinton unsuccessfully tried to tempt Washington into a decisive engagement by sending General William Tryon to raid Connecticut. In Jul...
In June 1780, Clinton sent 6,000 men under Wilhelm von Knyphausen to retake New Jersey, but they were halted by local militia at the Battle of Connecticut Farms; although the Americans withdrew, Knyphausen felt he was not strong enough to engage Washington's main force and retreated. A second attempt two weeks later en...
Germain ordered Augustine Prévost, the British commander in East Florida, to advance into Georgia in December 1778. Lieutenant-Colonel Archibald Campbell, an experienced officer, captured Savannah on December 29, 1778. He recruited a Loyalist militia of nearly 1,100, many of whom allegedly joined only after Campbell th...
Reinforced by Clinton, Cornwallis's troops captured Charleston in May 1780, inflicting the most serious Patriot defeat of the war; over 5,000 prisoners were taken and the Continental Army in the south effectively destroyed. On May 29, Lieutenant-Colonel Banastre Tarleton's mainly Loyalist force routed a Continental Arm...
In July 1780, Congress appointed Gates commander in the south; he was defeated at the Battle of Camden on August 16, leaving Cornwallis free to enter North Carolina. Despite battlefield success, the British could not control the countryside and Patriot attacks continued; before moving north, Cornwallis sent Loyalist mi...
The Patriots now controlled most of the Carolinas and Georgia outside the coastal areas; after a minor reversal at the Battle of Hobkirk's Hill, they recaptured Fort Watson and Fort Motte on April 15. On June 6, Brigadier General Andrew Pickens captured Augusta, leaving the British in Georgia confined to Charleston and...
When Spain joined France's war against Britain in the Anglo-French War in 1779, their treaty specifically excluded Spanish military action in North America. Later that year, however, Gálvez initiated offensive operations against British outposts. First, he cleared British garrisons in , Louisiana, Fort Bute, and Natche...
French soldier Augustin de La Balme led a Canadian militia in an attempt to capture Detroit, but they dispersed when Miami natives led by Little Turtle attacked the encamped settlers on November 5. The war in the west stalemated with the British garrison sitting in Detroit and the Virginians expanding westward settleme...
British defeat. Clinton spent most of 1781 based in New York City; he failed to construct a coherent operational strategy, partly due to his difficult relationship with Admiral Marriot Arbuthnot. In Charleston, Cornwallis independently developed an aggressive plan for a campaign in Virginia, which he hoped would isolat...
On August 31, a Royal Navy fleet under Thomas Graves left New York for Yorktown. After landing troops and munitions for the besiegers on August 30, de Grasse remained in Chesapeake Bay and intercepted him on September 5; although the Battle of the Chesapeake was indecisive in terms of losses, Graves was forced to retre...
In the U.S. South, Generals Greene and Wayne observed the British remove their troops from Charleston on December 14, 1782. Loyalist provincial militias of whites and free Blacks and Loyalists with slaves were transported to Nova Scotia and the British West Indies. Native American allies of the British and some freed B...
Strategy and commanders. To win their insurrection, Washington and the Continental Army needed to outlast the British will to fight. To restore British America, the British had to defeat the Continental Army quickly and compel the Second Continental Congress to retract its claim to self-governance. Historian Terry M. M...
American strategy. The Second Continental Congress stood to benefit if the Revolution evolved into a protracted war. Colonial state populations were largely prosperous and depended on local production for food and supplies rather than on imports from Britain. The thirteen colonies were spread across most of North Ameri...
Militiamen were lightly armed, had little training, and usually did not have uniforms. Their units served for only a few weeks or months at a time and lacked the training and discipline of more experienced soldiers. Local county militias were reluctant to travel far from home and were unavailable for extended operation...
Washington designed the overall military strategy in cooperation with Congress, established the principle of civilian supremacy in military affairs, personally recruited his senior officer corps, and kept the states focused on a common goal. Washington initially employed the inexperienced officers and untrained troops ...
On the whole, American officers never equaled their British opponents in tactics and maneuvers, and they lost most of the pitched battles. The great successes at Boston (1776), Saratoga (1777), and Yorktown (1781) were won by trapping the British far from base with a greater number of troops. After 1778, Washington's a...
Although the Continental Congress was responsible for the war effort and provided supplies to the troops, Washington took it upon himself to pressure Congress and the state legislatures to provide the essentials of war; there was never nearly enough. Congress evolved in its committee oversight and established the Board...
John Paul Jones became the first American naval hero when he captured HMS "Drake" on April 24, 1778, the first victory for any American military vessel in British waters. The last such victory was by the frigate USS "Alliance", commanded by Captain John Barry. On March 10, 1783, the "Alliance" outgunned HMS "Sybil" in ...
The decisive American victory at Saratoga convinced France, which was already a long-time rival of Britain, to offer the Americans the Treaty of Amity and Commerce. The two nations also agreed to a defensive Treaty of Alliance to protect their trade and also guaranteed American independence from Britain. To engage the ...
British strategy. The British military had considerable experience fighting in North America. However, in previous conflicts they benefited from local logistics and support from the colonial militia. In the American Revolutionary War, reinforcements had to come from Europe, and maintaining large armies over such distan...
Lord North, Prime Minister since 1770, delegated control of the war in North America to Lord George Germain and the Earl of Sandwich, who was head of the Royal Navy from 1771 to 1782. Defeat at Saratoga in 1777 made it clear the revolt would not be easily suppressed, especially after the Franco-American alliance of Feb...
The geographical size of the colonies and limited manpower meant the British could not simultaneously conduct military operations and occupy territory without local support. Debate persists over whether their defeat was inevitable; one British statesman described it as "like trying to conquer a map". While Ferling argu...
Over the course of the war, there were four separate British commanders-in-chief. The first was Thomas Gage, appointed in 1763, whose initial focus was establishing British rule in former French areas of Canada. Many in London blamed the revolt on his failure to take firm action earlier, and he was relieved after the h...
Following the failure of the Carlisle Commission, British policy changed from treating the Patriots as subjects who needed to be reconciled to enemies who had to be defeated. In 1778, Howe was replaced by Sir Henry Clinton. Regarded as an expert on tactics and strategy, like his predecessors Clinton was handicapped by ...
The first supply agreements were signed by the North administration in late 1775; 30,000 Germans served in the American War. Often generically referred to as "Hessians", they included men from many other states, including Hanover and Brunswick. Sir Henry Clinton recommended recruiting Russian troops whom he rated very ...
The prospect of foreign German soldiers being used in the colonies bolstered support for independence, more so than taxation and other acts combined; the King was accused of declaring war on his own subjects, leading to the idea there were now two separate governments. By apparently showing Britain was determined to go...
Revolution as civil war. Loyalists. Wealthy Loyalists convinced the British government that most of the colonists were sympathetic toward the Crown; consequently, British military planners relied on recruiting Loyalists, but had trouble recruiting sufficient numbers as the Patriots had widespread support. Approximately...
When the early war policy was administered by Howe, the Crown's need to maintain Loyalist support prevented it from using the traditional revolt suppression methods. The British cause suffered when their troops ransacked local homes during an aborted attack on Charleston in 1779 that enraged both Patriots and Loyalists...
Women also assumed military roles: some dressed as men to directly support combat, fight, or act as spies on both sides. Anna Maria Lane joined her husband in the Army. The Virginia General Assembly later cited her bravery: she fought while dressed as a man and "performed extraordinary military services, and received a...
The 1779 Philipsburg Proclamation issued by Clinton extended the offer of freedom to Patriot-owned slaves throughout the colonies. It persuaded entire families to escape to British lines, many of which were employed growing food for the army by removing the requirement for military service. While Clinton organized the ...
Black Patriots were barred from the Continental Army until Washington convinced Congress in January 1778 that there was no other way to replace losses from disease and desertion. The 1st Rhode Island Regiment formed in February included former slaves whose owners were compensated; however, only 140 of its 225 soldiers ...
Native Americans. Most Native Americans east of the Mississippi River were affected by the war, and many tribes were divided over how to respond. A few tribes were friendly with the colonists, but most Natives opposed the union of the Colonies as a potential threat to their territory. Approximately 13,000 Natives fough...
The Iroquois Confederacy was shattered as a result of the American Revolutionary War. The Seneca, Onondaga, and Cayuga tribes sided with the British; members of the Mohawks fought on both sides; and many Tuscarora and Oneida sided with the Americans. To retaliate against raids on American settlement by Loyalists and th...
Peace negotiations. The terms presented by the Carlisle Peace Commission in 1778 included acceptance of the principle of self-government. Parliament would recognize Congress as the governing body, suspend any objectionable legislation, surrender its right to local colonial taxation, and discuss including American repre...
When Lord Rockingham was elevated to Prime Minister, Congress consolidated its diplomatic consuls in Europe into a peace delegation at Paris. The dean of the delegation was Benjamin Franklin. He had become a celebrity in the French Court, but he was also influential in the courts of Prussia and Austria. Since the 1760s...
British strategy was to strengthen the U.S. sufficiently to prevent France from regaining a foothold in North America, and they had little interest in these proposals. However, divisions between their opponents allowed them to negotiate separately with each to improve their overall position, starting with the American ...
An Anglo-American Preliminary Peace was formally entered into in November 1782, and Congress endorsed the settlement on April 15, 1783. It announced the achievement of peace with independence, and the conclusive treaty was signed on September 2, 1783, in Paris, effective the following day when Britain signed its treaty...
Of the European powers with American colonies adjacent to the newly created U.S., Spain was most threatened by American independence, and it was correspondingly the most hostile to it. Its territory adjacent to the U.S. was relatively undefended, so Spanish policy developed a combination of initiatives. Spanish soft po...
Up to 70,000 American Patriots died during active military service. Of these, approximately 6,800 were killed in battle, while at least 17,000 died from disease. The majority of the latter died while prisoners of war of the British, mostly in the prison ships in New York Harbor. The number of Patriots seriously wounded...
Although the Revolution eliminated many forms of inequality, it did little to change the status of women, despite the role they played in winning independence. Most significantly, it failed to end slavery. While many were uneasy over the contradiction of demanding liberty for some, yet denying it to others, the depende...
"Two Treatises of Government" has long been cited as a major influence on Revolutionary-era American thinking, but historians David Lundberg and Henry F. May contend that Locke's "Essay Concerning Human Understanding" was far more widely read. Historians since the 1960s have emphasized that the Patriot constitutional a...
Ampere The ampere ( , ; symbol: A), often shortened to amp, is the unit of electric current in the International System of Units (SI). One ampere is equal to 1 coulomb (C) moving past a point per second. It is named after French mathematician and physicist André-Marie Ampère (1775–1836), considered the father of electr...
History. The ampere is named for French physicist and mathematician André-Marie Ampère (1775–1836), who studied electromagnetism and laid the foundation of electrodynamics. In recognition of Ampère's contributions to the creation of modern electrical science, an international convention, signed at the 1881 Internationa...
Since power is defined as the product of current and voltage, the ampere can alternatively be expressed in terms of the other units using the relationship , and thus 1 A = 1 W/V. Current can be measured by a multimeter, a device that can measure electrical voltage, current, and resistance. Former definition in the SI. ...

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