Eduqas A Level Physics
Eduqas A Level Physics 2.4 Capacitance Exam Questions
Free Eduqas A Level Physics exam questions on 2.4 Capacitance, with mark schemes. Covers capacitors, energy stored, combinations and charging and discharging.
2.4 Capacitance exam questions
1 question pack of real past exam questions with its mark scheme. Answer every question without notes, then mark your answers line by line against the mark scheme.
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A Level Physics Flashcards
Every answer is written in mark scheme wording, so you learn exactly what examiners give marks for. Pick your exam board, then test yourself with the questions on this page.
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About Eduqas A Level Physics 2.4 Capacitance
This topic covers capacitors in circuits.
What you need to know
- Capacitance C = Q/V and C = ε₀A/d for parallel plates.
- Energy U = ½QV = ½CV².
- Combinations Parallel capacitors add; series use reciprocals.
- Discharge Q = Q₀e^(−t/RC); time constant RC.
Common mistakes in 2.4 Capacitance
- Mixing up resistor and capacitor combination rules.
- Forgetting the ½ in energy.
- Using the wrong time constant.
Try three 2.4 Capacitance exam-style questions
1. Find the energy in a 470 μF capacitor at 12 V. (1 mark)
Show the mark scheme answer
0.034 J.
2. State what the time constant represents. (1 mark)
Show the mark scheme answer
Time for charge to fall to 37% of its initial value.
3. Find the total of 2 μF and 3 μF in series. (1 mark)
Show the mark scheme answer
1.2 μF.
2.4 Capacitance FAQs
What does Capacitance cover?
Capacitance, energy, combinations and RC circuits.
Which practical links here?
Investigating the discharge of a capacitor.
How is RC found from a graph?
From the gradient of ln V against t, which is −1/RC.
Revise this topic with flashcards: A Level Physics Flashcards, with mark scheme answers for Anki and Quizlet.
