How many Potential difference and power questions are there for 9702?

This page collects 6 recent Cambridge Physics (9702) past-paper questions tagged to Potential difference and power. Each links straight to instant marking against the official 9702 scheme.

How are Potential difference and power answers marked?

Type or photograph your working and MarkScheme scores it against the real 9702 mark scheme for this topic — method, accuracy and any band descriptors — so you see exactly where the marks are.

Where can I learn Potential difference and power first?

Start with the free Physics lesson on Potential difference and power, then come back and drill past-paper questions under timed conditions.

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9702 · topic questions

Potential difference and power

Physics6 questions

6 past-paper questions on Potential difference and power

9702/22 · May/June 20242 marks
The potential difference between the ground and the atmosphere is 3.0 × 10^7 V. Calculate the average power, in GW, transferred…
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9702/41 · May/June 20242 marks
The load resistor R has a resistance of 370 Ω. Show that the maximum power dissipated in R is 0.22 W.
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9702/22 · October/November 20242 marks
Calculate the power dissipated in component X.
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9702/23 · May/June 20252 marks
Show that the power P developed by the engine in overcoming the total resistive force is given by the equation P = Fv.
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9702/23 · October/November 20242 marks
Explain, without calculation, how the power dissipated in the wire changes as the temperature of the thermistor is increased.
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9702/23 · May/June 20252 marks
Use the information in (b)(i) to determine the power developed by the engine to move the car up the slope.
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Question stems are shortened previews. Open a question to attempt the full version and have it marked.

Worked example

What a lost mark actually looks like

This answer reaches the right coordinates and still drops a mark — the conclusion is stated, but never justified. Examiners pay for the reasoning, not the answer.

MARKED

80%

Strong

M1dy/dx = 3x^2 - 12x + 9M1 earned
M1(x - 1) $(x - 3) = 0$ M1 earned
A1 $x = 1$ or $x = 3$ A1 earned
B1(1, 5) is a maximum and (3, 1) is a minimumB1 not earned

B1 — withheld
You stated the nature of each point correctly, but stated it without justification. This mark needs the reasoning shown — either evaluate the second derivative (d²y/dx² = 6x − 12, giving −6 at $x = 1$ and +6 at $x = 3$ ) or show a sign change of dy/dx either side of each point. An unsupported assertion earns nothing here even when the conclusion is right.

Potential difference and power (9702) past-paper questions — marked instantly

These are real Cambridge Physics past-paper questions on Potential difference and power. Open one, attempt it, then upload your working — MarkScheme grades it against the official 9702 mark scheme so you see exactly where the marks are won and lost on this topic.

Mark your answer →Learn Potential difference and power 9702 grade boundaries

Frequently asked questions

How many Potential difference and power questions are there for 9702?: This page collects 6 recent Cambridge Physics (9702) past-paper questions tagged to Potential difference and power. Each links straight to instant marking against the official 9702 scheme.
How are Potential difference and power answers marked?: Type or photograph your working and MarkScheme scores it against the real 9702 mark scheme for this topic — method, accuracy and any band descriptors — so you see exactly where the marks are.
Where can I learn Potential difference and power first?: Start with the free Physics lesson on Potential difference and power, then come back and drill past-paper questions under timed conditions.