A-Level Physics Question and Answers 2015 - s-cool.co.uk

1 A-Level PhysicsQuestion and Answers 2020/2021 All copyright and publishing rights are owned by S-cool. First created in 2000 and updated in 2013, 2015 & 2020 2 Table of Contents A Comparison of Electric and Gravitational Fields (Questions) * .. 5 A Comparison of Electric and Gravitational Fields ( Answers ) .. 8 Capacitors (Questions) * .. 10 Capacitors ( Answers ) .. 13 Circular Motion (Questions) .. 14 Circular Motion ( Answers ) .. 16 Current, Charge and Voltage (Questions) .. 18 Current, Charge and Voltage ( Answers ) .. 21 Deformation of Solids (Questions) .. 23 Deformation of Solids ( Answers ) .. 25 Diffraction (Questions) .. 26 Diffraction ( Answers ) .. 28 Electric Fields and Forces (Questions).

2 31 Electric Potential (Questions) * .. 35 Electric Potential ( Answers ) .. 37 Electromagnetic Induction (Questions) * .. 38 Electromagnetic Waves (Questions) .. 40 Electromagnetic Waves ( Answers ) .. 43 Equations of Motion (Questions) .. 44 Equations of Motion ( Answers ).. 47 Forces (Questions) * .. 49 Forces ( Answers ) .. 51 Forces in Magnetic Fields (Questions) .. 52 Forces in Magnetic Fields ( Answers ) .. 55 Gravitational Fields and Forces (Questions) .. 57 Gravitational Fields and Forces ( Answers ) .. 59 Gravitational Potential Energy (Questions) * .. 60 Gravitational Potential Energy ( Answers ) .. 62 Kinetic Theory (Questions) * .. 64 Kinetic Theory ( Answers ) .. 65 Kirchoff's Laws and Potential Dividers (Questions) *.

3 67 All copyright and publishing rights are owned by S-cool. First created in 2000 and updated in 2013, 2015 & 2020 3 Kirchoff's Laws and Potential Dividers ( Answers ) .. 70 Lenz's Law (Questions) .. 72 Lenz's Law ( Answers ).. 74 Matter and Antimatter (Questions) .. 75 Matter and Antimatter ( Answers ) .. 76 Moments, Couples and Equilibrium (Questions) .. 77 Moments, Couples and Equilibrium ( Answers ) .. 79 Momentum and Impulse (Questions) .. 81 Nuclear Energy (Questions) * .. 83 Nuclear Energy ( Answers ) .. 84 Particle Classification and Interactions (Questions) .. 85 Particle Classification and Interactions ( Answers ) .. 86 Power and Energy (Questions) .. 88 Power and Energy ( Answers ).

4 90 Power and Internal Energy (Questions) .. 92 Power and Internal Energy ( Answers ) .. 93 Progressive Waves (Questions) *.. 95 Progressive Waves ( Answers ) .. 98 Quantum Physics (Questions) * .. 99 Quantum Physics ( Answers ) .. 101 Radioactive Decay Equations (Questions) .. 104 Radioactive Decay Equations ( Answers ) .. 105 Radioactivity (Questions) * .. 106 Radioactivity ( Answers ) .. 108 Reflection, Refraction and Polarisation (Questions) *.. 109 Reflection, Refraction and Polarisation ( Answers ) .. 111 Resistance (Questions) .. 113 Resistance ( Answers ) .. 115 Simple Harmonic Motion and Damping (Questions) * .. 116 Simple Harmonic Motion and Damping ( Answers ) .. 120 Stress and Strain (Questions) *.

5 122 Stress and Strain ( Answers ) .. 123 All copyright and publishing rights are owned by S-cool. First created in 2000 and updated in 2013, 2015 & 20204 Temperature and Thermal Properties (Questions) * .. 125 Temperature and Thermal Properties ( Answers ) .. 126 Thermodynamics and Ideal Gases (Questions) * .. 127 Thermodynamics and Ideal Gases ( Answers ) .. 129 Transformers and Rectification (Questions) .. 130 Transformers and Rectification ( Answers ) .. 132 Units, Quantities and Measurements (Questions) * .. 133 Units, Quantities and Measurements ( Answers ) .. 135 Vectors and Scalars and Linear Motion (Questions) * .. 136 Vectors and Scalars and Linear Motion ( Answers ) .. 139 Wave Particle Duality and Electron Energy levels (Questions).

6 141 Wave Particle Duality and Electron Energy levels ( Answers ) .. 143 Work, Energy and Efficiency (Questions) * .. 145 Work, Energy and Efficiency ( Answers ) .. 147 * = topics that contain interactive resources, multiple choice questions or audio files. To interact with thiscontent, please go to questions cover the main areas of this subject. Please check the specific areas you need with your exam board. They are provided as is and S-cool do not guaranteed the suitability, accuracy or completeness of this content and S-cool will not be liable for any losses you may incur as a result of your use or non-use of this content. By using these notes, you are accepting the standard terms and conditions of S-cool, as stated in the s-cool website ( ).

7 All copyright and publishing rights are owned by S-cool. First created in 2000 and updated in 2013, 2015 & 2020 5 Topics that only contain interactive questions These topics only contain interactive questions such as animations, multiple choice or audio files. To interact with this content, please go to Alternating Currents Atomic Structure Magnetic Fields All copyright and publishing rights are owned by S-cool. First created in 2000 and updated in 2013, 2015 & 2020 6 A Comparison of Electric and Gravitational Fields (Questions) * 1. The graphs in Fig. show the variation with seperation r of (i) the electrostatic force FE and (ii) the gravitational force FG between two points.

8 A) State the relation between i) FE and r ii) FG and r. (2 Marks) b) Why is FE positive, whereas FG is negative? (1 Mark) c) The range of values or r represented by each graph is the same. State with a reason whether the FE and FGscales cover the same range of values. (2 Marks) (Marks available: 5) 2. A hydrogen atom appears to behave like a proton orbited by an electron with an orbit radius of x 10-10 m. Given that - ekectronic charge = x 10-19 C. electron mass = x 10-31 kg proton mass = x 10-27 kg All copyright and publishing rights are owned by S-cool. First created in 2000 and updated in 2013, 2015 & 20207 Electric field constant = 1 = x 109 Nm2 C-2 4 o and Gravitational Field Constant = G = x 10-11 N m2 kg-2 Calculate: a)the electric fild at a distance of x 10-10 m from a proton.

9 (2 Marks) b)the electrical force on an electron at that distance from a proton.(2 Marks) c)the Gravitational Field at a distance of x 10-10 m from a proton.(2 Marks) d)the gravitational force on an electron at that distance from a proton.(2 Marks) e)the ratio of the electrical force to the gravitational force on an electron.(1 Mark) (Marks available: 9) All copyright and publishing rights are owned by S-cool. First created in 2000 and updated in 2013, 2015 & 2020 8 A Comparison of Electric and Gravitational Fields ( Answers ) Answer outline and marking scheme for Question : 1. a) i) FE proportional to 1/r2 or FE = Q2/(4 0r2) or in words ii) FG proportional to (-) 1/r2 or FG = (-) m2G/r2) or in words (2 Marks) b) Eletrostatic forces (between protons) always repulsive gravitational forces always attractive (1 Mark) c) (at equal seperations) magnitude of FE >> magnitude of FG so FE scale has bigger range of values than FG (2 Marks) (Marks available: 5) 2.

10 A) Electric field = 1 . Q (1 Mark) = x 109 x x 10-19 4 o r2 ( x 10-10)2 3. = x 1011 NC-1(1 Mark) 4. (2 Marks) 5. b) Electric Force = eE = x 10-19x x 1011 (1 Mark) 6. = x 10-8 N (1 Mark) 7. (2 Marks) 8. c) All copyright and publishing rights are owned by S-cool. First created in 2000 and updated in 2013, 2015 & 2020 9 Gravitational field = GM = x 10-11 x x 10-27 r2 ( x 10-10)2 9. = x 10-17 N kg-1 (1 Mark) 10. (2 Marks) 11. d) Gravitational force = mass x gravitational field = x 10-27 x x 10-17 (1 Mark) 12. = x 10-47 N (1 Mark) 13. (2 Marks) 14. e) Electrical force = x 10-8 = x 1039 (1 Mark) Gravitational force x 10-47 15. (1 Mark) 16. (Marks available: 9) 17.