| [ | |
| { | |
| "question_number": "1(i)", | |
| "type": "mcq", | |
| "marks": 1, | |
| "correct_answer": "b" | |
| }, | |
| { | |
| "question_number": "1(ii)", | |
| "type": "mcq", | |
| "marks": 1, | |
| "correct_answer": "a" | |
| }, | |
| { | |
| "question_number": "1(iii)", | |
| "type": "mcq", | |
| "marks": 1, | |
| "correct_answer": "c" | |
| }, | |
| { | |
| "question_number": "1(iv)", | |
| "type": "mcq", | |
| "marks": 1, | |
| "correct_answer": "a" | |
| }, | |
| { | |
| "question_number": "1(v)", | |
| "type": "mcq", | |
| "marks": 1, | |
| "correct_answer": "b" | |
| }, | |
| { | |
| "question_number": "1(vi)", | |
| "type": "mcq", | |
| "marks": 1, | |
| "correct_answer": "c" | |
| }, | |
| { | |
| "question_number": "1(vii)", | |
| "type": "mcq", | |
| "marks": 1, | |
| "correct_answer": "d" | |
| }, | |
| { | |
| "question_number": "1(viii)", | |
| "type": "mcq", | |
| "marks": 1, | |
| "correct_answer": "b" | |
| }, | |
| { | |
| "question_number": "1(ix)", | |
| "type": "mcq", | |
| "marks": 1, | |
| "correct_answer": "a" | |
| }, | |
| { | |
| "question_number": "1(x)", | |
| "type": "mcq", | |
| "marks": 1, | |
| "correct_answer": "a" | |
| }, | |
| { | |
| "question_number": "1(xi)", | |
| "type": "mcq", | |
| "marks": 1, | |
| "correct_answer": "b" | |
| }, | |
| { | |
| "question_number": "1(xii)", | |
| "type": "mcq", | |
| "marks": 1, | |
| "correct_answer": "a" | |
| }, | |
| { | |
| "question_number": "1(xiii)", | |
| "type": "mcq", | |
| "marks": 1, | |
| "correct_answer": "c" | |
| }, | |
| { | |
| "question_number": "1(xiv)", | |
| "type": "mcq", | |
| "marks": 1, | |
| "correct_answer": "d" | |
| }, | |
| { | |
| "question_number": "1(xv)", | |
| "type": "mcq", | |
| "marks": 1, | |
| "correct_answer": "a" | |
| }, | |
| { | |
| "question_number": "2(i)(a)", | |
| "type": "long answer", | |
| "marks": 2, | |
| "correct_answer": "C¹⁴ is a radioisotope. Used for carbon dating." | |
| }, | |
| { | |
| "question_number": "2(i)(b)", | |
| "type": "long answer", | |
| "marks": 1, | |
| "correct_answer": "Class II lever." | |
| }, | |
| { | |
| "question_number": "2(ii)(a)", | |
| "type": "long answer", | |
| "marks": 1, | |
| "correct_answer": "Centripetal" | |
| }, | |
| { | |
| "question_number": "2(ii)(b)", | |
| "type": "long answer", | |
| "marks": 1, | |
| "correct_answer": "zero" | |
| }, | |
| { | |
| "question_number": "2(iii)", | |
| "type": "numerical", | |
| "marks": 2, | |
| "correct_answer": "30 N" | |
| }, | |
| { | |
| "question_number": "2(iv)(a)", | |
| "type": "long answer", | |
| "marks": 1, | |
| "correct_answer": "Mechanical advantage using a block and tackle system of 9 pulleys is 9 whereas the mechanical advantage of a single moveable pulley is 2." | |
| }, | |
| { | |
| "question_number": "2(iv)(b)", | |
| "type": "long answer", | |
| "marks": 1, | |
| "correct_answer": "Increase of number of pulley increases mechanical advantage." | |
| }, | |
| { | |
| "question_number": "2(v)", | |
| "type": "numerical", | |
| "marks": 2, | |
| "correct_answer": "4:1" | |
| }, | |
| { | |
| "question_number": "2(vi)(a)", | |
| "type": "long answer", | |
| "marks": 1, | |
| "correct_answer": "Resistance decreases" | |
| }, | |
| { | |
| "question_number": "2(vi)(b)", | |
| "type": "long answer", | |
| "marks": 1, | |
| "correct_answer": "Current (Intensity of light) increases as resistance decreases" | |
| }, | |
| { | |
| "question_number": "2(vii)", | |
| "type": "numerical", | |
| "marks": 2, | |
| "correct_answer": "x : y = 17 : 10" | |
| }, | |
| { | |
| "question_number": "3(i)(a)", | |
| "type": "long answer", | |
| "marks": 1, | |
| "correct_answer": "In between optical centre and focus" | |
| }, | |
| { | |
| "question_number": "3(i)(b)", | |
| "type": "long answer", | |
| "marks": 1, | |
| "correct_answer": "Because concave lens produces reduced size image." | |
| }, | |
| { | |
| "question_number": "3(ii)", | |
| "type": "long answer", | |
| "marks": 2, | |
| "correct_answer": "No. The geyser draws I = P/V = 1540/220 = 7A. Hence, 5A rated fuse will blow off for the geyser." | |
| }, | |
| { | |
| "question_number": "3(iii)", | |
| "type": "long answer", | |
| "marks": 2, | |
| "correct_answer": "1. Increasing the number of turns of the armature. 2. Increasing the applied battery e.m.f." | |
| }, | |
| { | |
| "question_number": "3(iv)", | |
| "type": "numerical", | |
| "marks": 2, | |
| "correct_answer": "165000 J" | |
| }, | |
| { | |
| "question_number": "3(v)", | |
| "type": "long answer", | |
| "marks": 2, | |
| "correct_answer": "₅₆Ba¹⁴¹ + ₃₆Kr⁹² + 3₀n¹" | |
| }, | |
| { | |
| "question_number": "4(i)", | |
| "type": "numerical", | |
| "marks": 3, | |
| "correct_answer": "f = 24 cm, Power = 4.17 D" | |
| }, | |
| { | |
| "question_number": "4(ii)(a)", | |
| "type": "long answer", | |
| "marks": 1, | |
| "correct_answer": "Microwave" | |
| }, | |
| { | |
| "question_number": "4(ii)(b)", | |
| "type": "long answer", | |
| "marks": 1, | |
| "correct_answer": "X-rays" | |
| }, | |
| { | |
| "question_number": "4(ii)(c)", | |
| "type": "long answer", | |
| "marks": 1, | |
| "correct_answer": "Both have same speed in vacuum" | |
| }, | |
| { | |
| "question_number": "4(iii)(a)", | |
| "type": "long answer", | |
| "marks": 1, | |
| "correct_answer": "Red colour is scattered least due to its longest wavelength in visible range." | |
| }, | |
| { | |
| "question_number": "4(iii)(b)1", | |
| "type": "numerical", | |
| "marks": 1, | |
| "correct_answer": "43°" | |
| }, | |
| { | |
| "question_number": "4(iii)(b)2", | |
| "type": "numerical", | |
| "marks": 1, | |
| "correct_answer": "60°" | |
| }, | |
| { | |
| "question_number": "4(iii)(b)3", | |
| "type": "long answer", | |
| "marks": 1, | |
| "correct_answer": "Indigo or violet" | |
| }, | |
| { | |
| "question_number": "5(i)(a)", | |
| "type": "numerical", | |
| "marks": 1, | |
| "correct_answer": "8/9" | |
| }, | |
| { | |
| "question_number": "5(i)(b)", | |
| "type": "long answer", | |
| "marks": 1, | |
| "correct_answer": "The principle of reversibility" | |
| }, | |
| { | |
| "question_number": "5(i)(c)", | |
| "type": "long answer", | |
| "marks": 1, | |
| "correct_answer": "No" | |
| }, | |
| { | |
| "question_number": "5(ii)(a)", | |
| "type": "long answer", | |
| "marks": 1, | |
| "correct_answer": "False" | |
| }, | |
| { | |
| "question_number": "5(ii)(b)", | |
| "type": "numerical", | |
| "marks": 1, | |
| "correct_answer": "10t₂/t₁" | |
| }, | |
| { | |
| "question_number": "5(iii)(a)", | |
| "type": "long answer", | |
| "marks": 2, | |
| "correct_answer": "Diagram completion (path traced through prism)" | |
| }, | |
| { | |
| "question_number": "5(iii)(b)", | |
| "type": "long answer", | |
| "marks": 2, | |
| "correct_answer": "1. Angle of incidence 2. Refractive index" | |
| }, | |
| { | |
| "question_number": "6(i)(a)", | |
| "type": "long answer", | |
| "marks": 1, | |
| "correct_answer": "Centre of gravity is the point where the mass of the whole body appears to be concentrated." | |
| }, | |
| { | |
| "question_number": "6(i)(b)1", | |
| "type": "numerical", | |
| "marks": 1, | |
| "correct_answer": "2 cm" | |
| }, | |
| { | |
| "question_number": "6(i)(b)2", | |
| "type": "long answer", | |
| "marks": 1, | |
| "correct_answer": "Yes" | |
| }, | |
| { | |
| "question_number": "6(ii)(a)", | |
| "type": "long answer", | |
| "marks": 1, | |
| "correct_answer": "Marble A" | |
| }, | |
| { | |
| "question_number": "6(ii)(b)", | |
| "type": "long answer", | |
| "marks": 1, | |
| "correct_answer": "Path 1" | |
| }, | |
| { | |
| "question_number": "6(ii)(c)", | |
| "type": "long answer", | |
| "marks": 1, | |
| "correct_answer": "Both paths" | |
| }, | |
| { | |
| "question_number": "6(iii)(a)", | |
| "type": "long answer", | |
| "marks": 2, | |
| "correct_answer": "Diagram with VR=2 pulley system" | |
| }, | |
| { | |
| "question_number": "6(iii)(b)1", | |
| "type": "numerical", | |
| "marks": 1, | |
| "correct_answer": "1.6" | |
| }, | |
| { | |
| "question_number": "6(iii)(b)2", | |
| "type": "numerical", | |
| "marks": 1, | |
| "correct_answer": "30 kgf" | |
| }, | |
| { | |
| "question_number": "7(i)(a)", | |
| "type": "long answer", | |
| "marks": 1, | |
| "correct_answer": "Ultrasonic wave" | |
| }, | |
| { | |
| "question_number": "7(i)(b)", | |
| "type": "numerical", | |
| "marks": 2, | |
| "correct_answer": "1 s" | |
| }, | |
| { | |
| "question_number": "7(ii)(a)", | |
| "type": "long answer", | |
| "marks": 2, | |
| "correct_answer": "²³⁴₉₀Th → ²³⁰₈₈Ra + ⁴₂He → ²³⁴₉₁Pa + ⁰₋₁e" | |
| }, | |
| { | |
| "question_number": "7(ii)(b)", | |
| "type": "long answer", | |
| "marks": 1, | |
| "correct_answer": "U-235" | |
| }, | |
| { | |
| "question_number": "7(iii)(a)", | |
| "type": "long answer", | |
| "marks": 1, | |
| "correct_answer": "Resonance" | |
| }, | |
| { | |
| "question_number": "7(iii)(b)", | |
| "type": "long answer", | |
| "marks": 1, | |
| "correct_answer": "Natural frequency of the air column matched with the frequency of the tuning fork." | |
| }, | |
| { | |
| "question_number": "7(iii)(c)", | |
| "type": "long answer", | |
| "marks": 1, | |
| "correct_answer": "Decrease. Frequency is inversely proportional to the air column length." | |
| }, | |
| { | |
| "question_number": "8(i)(a)", | |
| "type": "long answer", | |
| "marks": 1, | |
| "correct_answer": "Non-ohmic" | |
| }, | |
| { | |
| "question_number": "8(i)(b)", | |
| "type": "long answer", | |
| "marks": 1, | |
| "correct_answer": "The resistance is not constant. It increases as voltage and current increases." | |
| }, | |
| { | |
| "question_number": "8(i)(c)", | |
| "type": "long answer", | |
| "marks": 1, | |
| "correct_answer": "Ohm’s law: The flow of current through the conductor is directly proportional to the potential difference established across the conductor provide its physical conditions are constant." | |
| }, | |
| { | |
| "question_number": "8(ii)(a)", | |
| "type": "long answer", | |
| "marks": 1, | |
| "correct_answer": "Step down transformer" | |
| }, | |
| { | |
| "question_number": "8(ii)(b)", | |
| "type": "long answer", | |
| "marks": 2, | |
| "correct_answer": "Secondary wire is thicker because secondary current is higher than primary current." | |
| }, | |
| { | |
| "question_number": "8(iii)(a)", | |
| "type": "numerical", | |
| "marks": 1, | |
| "correct_answer": "8 Ω" | |
| }, | |
| { | |
| "question_number": "8(iii)(b)", | |
| "type": "numerical", | |
| "marks": 1, | |
| "correct_answer": "0.5 A" | |
| }, | |
| { | |
| "question_number": "8(iii)(c)", | |
| "type": "long answer", | |
| "marks": 1, | |
| "correct_answer": "Equal" | |
| }, | |
| { | |
| "question_number": "9(i)", | |
| "type": "numerical", | |
| "marks": 3, | |
| "correct_answer": "25 g" | |
| }, | |
| { | |
| "question_number": "9(ii)(a)", | |
| "type": "long answer", | |
| "marks": 1, | |
| "correct_answer": "When lake freezes, it releases latent heat to the atmosphere which warms it." | |
| }, | |
| { | |
| "question_number": "9(ii)(b)", | |
| "type": "long answer", | |
| "marks": 1, | |
| "correct_answer": "No change in average kinetic energy." | |
| }, | |
| { | |
| "question_number": "9(ii)(c)", | |
| "type": "long answer", | |
| "marks": 1, | |
| "correct_answer": "1 g of ice at 0°C (has latent heat)" | |
| }, | |
| { | |
| "question_number": "9(iii)(a)", | |
| "type": "long answer", | |
| "marks": 1, | |
| "correct_answer": "Number of turns in armature" | |
| }, | |
| { | |
| "question_number": "9(iii)(b)1", | |
| "type": "long answer", | |
| "marks": 1, | |
| "correct_answer": "Maxwell right hand thumb rule" | |
| }, | |
| { | |
| "question_number": "9(iii)(b)2", | |
| "type": "long answer", | |
| "marks": 1, | |
| "correct_answer": "X to Y" | |
| }, | |
| { | |
| "question_number": "9(iii)(b)3", | |
| "type": "long answer", | |
| "marks": 1, | |
| "correct_answer": "Density of magnetic lines of force decreases" | |
| } | |
| ] |