Chapter 1: Capacitors and Exponential Decay

A-level PhysicsModule 6: Particles & Medical Physics8 topicsHigher

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Module 6: Particles and Medical Physics: Capacitors and Exponential Decay - Authored Long Answer Questions

Examiner-style long-answer practice with automatic marking, improvement advice and ProofCoach tracking.

4 questions25 marks37.5 min

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6 marksdescribestandardOCR A

For Capacitors and Exponential Decay, describe how capacitance, energy and exponential decay applies to capacitor discharging through a fixed resistor.

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6 markscalculatehardOCR A

Using capacitor discharging through a fixed resistor, calculate a relevant OCR A Capacitors and Exponential Decay quantity and explain the physical or chemical meaning of the answer. Show equation, substitution, answer and unit.

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7 marksexplainhardOCR A

Capacitors and Exponential Decay - data from: capacitor discharging through a fixed resistor

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Plotting ln V against t gives a straight line. Gradient = -1/(RC) about -0.25 s-1, so RC = 4 s. The y-intercept gives V0 = 12 V.

The graph for Capacitors and Exponential Decay shows data from capacitor discharging through a fixed resistor. Explain the pattern using the data and relevant physics principles.

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6 marksevaluatestandardOCR A

In capacitor discharging through a fixed resistor, evaluate the experimental method or model assumptions used when applying capacitance, energy and exponential decay.

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Start of Module 6: Particles & Medical Physics

2. Electric Fields and Electric Potential

Key learning objectives

Understand the key principles behind Capacitors and Exponential Decay.
Apply these ideas to exam-style questions.
Recall the essential definitions and key terms.