← all papers · Physics · 9702 · Paper 49702/04/SP/22

Practice

1. Question 15 marks
   • 1(a)Explain how the force(s) on a satellite can result in the satellite being in a circular orbit around a planet.2 marks
   • 1(c)Use the expression in (b) to calculate ρ.3 marks
2. Question 210 marks
   • 2(a)Calculate the thermodynamic temperature of the gas.2 marks
   • 2(b)(i)Show that the new volume of the gas is 4.75 × 10⁻² m³.1 mark
   • 2(b)(ii)Explain your working.3 marks
   • 2(c)(i)Use this information to calculate the external work done during the expansion of the gas.2 marks
   • 2(c)(ii)Explain your reasoning.2 marks
3. Question 36 marks
   • 3(a)(i)For the oscillating magnet, use data from Fig. 3.2 to determine, to two significant figures, the frequency f.2 marks
   • 3(a)(ii)For the oscillating magnet, use data from Fig. 3.2 to determine, to two significant figures, the energy of the oscillations during the time interval t = 0 to t = 6.0 s.3 marks
   • 3(b)Explain, with reference to Fig. 3.2, whether this damping is light, critical or heavy.1 mark
4. Question 45 marks
   • 4(a)State Coulomb's law.2 marks
   • 4(b)(ii)Use data from Fig. 4.2 to determine the magnitude of the acceleration of the proton.3 marks
5. Question 59 marks
   • 5(a)(i)Determine the root-mean-square (r.m.s.) value of the supply potential difference before rectification.2 marks
   • 5(a)(ii)State the type of rectification shown in Fig. 5.1.1 mark
   • 5(b)(i)On Fig. 5.1, draw a line to show V_OUT between times t = 1.0 ms and t = 5.0 ms.3 marks
   • 5(b)(ii)Determine the time, in s, for which the capacitor is discharging between times t = 1.0 ms and t = 5.0 ms.1 mark
   • 5(b)(iii)Using your smoothed V_OUT line drawn on Fig. 5.1 and the discharging time found in (b)(ii), calculate the resistance R.2 marks
6. Question 62 marks
   • 6(a)(i)Use letters from Fig. 6.1 to identify the two faces between which the Hall voltage is produced.1 mark
   • 6(b)(i)Use the letters in Fig. 6.1 to identify the distance t.1 mark
7. Question 74 marks
   • 7(b)Calculate the average electromotive force (e.m.f.) induced in coil C when a current of 3.5 A is reversed in the solenoid in a time of 2.4 ms.2 marks
   • 7(c)Describe qualitatively the e.m.f.2 marks
8. Question 89 marks
   • 8(a)Describe two phenomena associated with the photoelectric effect that cannot be explained using a wave theory of light.2 marks
   • 8(b)(i)Identify the symbol λ₀.1 mark
   • 8(b)(ii)Use Fig. 8.1 to determine the magnitude of λ₀.1 mark
   • 8(b)(iii)Show your working.3 marks
   • 8(c)On Fig. 8.1, draw a line to show the variation with 1/λ of E_max for the oxidised surface.2 marks
9. Question 94 marks
   • 9(a)Complete the equation.1 mark
   • 9(b)(ii)Calculate the binding energy per nucleon, in MeV, of lanthanum-139 (¹³⁹₅₇La).3 marks
10. Question 108 marks
    • 10(a)(i)State what is meant by contrast in an X-ray image.1 mark
    • 10(a)(ii)Calculate the ratio (intensity of radiation transmitted through the bone) / (intensity of radiation transmitted through the muscle).2 marks
    • 10(b)(i)Explain how ultrasound pulses are used to obtain diagnostic information about internal body structures in medical diagnosis.3 marks
    • 10(b)(iii)State the approximate value of the intensity reflection coefficient at the boundary between the two media when: • Z₁ is almost equal to Z₂ • Z₁ is very different from Z₂.2 marks
11. Question 118 marks
    • 11(a)(i)State what is meant by a tracer.2 marks
    • 11(a)(ii)State the name of the particles that are emitted from the body and detected by the detectors during PET scanning.1 mark
    • 11(b)Explain how these particles are created from positrons.3 marks
    • 11(c)Suggest why two of these photons are needed to create one positron.2 marks
12. Question 127 marks
    • 12(a)(i)Name the term used to describe an astronomical object that has known luminosity.1 mark
    • 12(a)(ii)Determine the distance of the star from Earth.2 marks
    • 12(b)(i)Explain your reasoning.2 marks
    • 12(b)(ii)Use this information to determine the radius of the star.2 marks