OCR Interchange October 2021 A Level Physics/ H556/02 Exploring physics; Top Score

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October 2021 A Level Physics A H556/02 Exploring physics Time allowed: 2 hours 15 minutes * H 5 5 6 0 2 * INSTRUCTIONS • Use black ink. You can use an HB pencil, but only for graphs and diagrams. �... � Write your answer to each question in the space provided. If you need extra space use the lined pages at the end of this booklet. The question numbers must be clearly shown. • Answer all the questions. • Where appropriate, your answer should be supported with working. Marks might be given for using a correct method, even if your answer is wrong. INFORMATION • The total mark for this paper is 100. • The marks for each question are shown in brackets [ ]. • Quality of extended responses will be assessed in questions marked with an asterisk (*). • This document has 32 pages. ADVICE • Read each question carefully before you start your answer. SECTION A You should spend a maximum of 30 minutes on this section. Write your answer to each question in the box provided. Answer all the questions. 1 Faraday’s law of electromagnetic induction is written below with two terms missing. The ...................................... induced in a circuit is directly proportional to the rate of change of magnetic flux ...................................... . What are the two missing terms? A current, density B current, linkage C electromotive force, density D electromotive force, linkage Your answer [1] 2 Monochromatic light from a laser is incident normally on a diffraction grating. A series of bright dots are formed on a distant screen. Which two terms can be used to explain these bright dots? A diffraction, interference B reflection, interference C refraction, diffraction D refraction, reflection Your answer [1] 3 The current in a lamp is 2.0 mA. The potential difference across the lamp is 6.0 V. What is the energy transfer in the lamp over a period of 3.0 hours? A 0.012 J B 0.036 J C 2.16 J D 130 J Your answer [1] 4 The diagram below shows two oppositely charged spheres. P The magnitude of the charge on each sphere is the same. The point P is on the line joining the centres of the spheres and is the same distance from the centre of each sphere. Which statement is correct? A A negatively charged particle at P will move to the right. B The direction of the electric field at P is to the left. C The electric potential at P is zero. D The magnitude of the electric field strength at P is zero. Your answer [1] 5 A circuit with four light-emitting diodes (LEDs) P, Q, R and S is shown below. Two LEDs are lit in this circuit. Which two LEDs are lit? A P and Q B P and R C Q and R D Q and S Your answer [1] 6 A student is modelling the decay of charge for a capacitor discharging through a resistor using the equation ∆Q ∆t = – 0.2Q. The student decides to use ∆t = 0.5 s. The initial charge on the capacitor is 1000 µC. Part of the modelling spreadsheet from the student is shown below. t / s Charge Q left on capacitor at time t / µC Charge ∆Q decaying in the next 0.5 s / µC 0 1000 100 0.5 900 1.0 1.5 What is the value of Q in µC at t = 1.5 s? [Show More]

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