How many Errors and uncertainties questions are there for 9702?

Open MarkScheme to attempt a real 9702 past-paper question on Errors and uncertainties against the official scheme. Topic-tagged stems are added as we verify them.

How are Errors and uncertainties 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 Errors and uncertainties first?

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

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9702 · topic questions

Errors and uncertainties

PhysicsMark practice ready

Practise Errors and uncertainties with marking

Pick a real 9702 past-paper question on syllabus point 1.3, type or photograph your answer, and get Examiner's Ink against the official scheme.

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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.

Errors and uncertainties (9702) past-paper questions — marked instantly

These are real Cambridge Physics past-paper questions on Errors and uncertainties. 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 Errors and uncertainties 9702 grade boundaries

Frequently asked questions

How many Errors and uncertainties questions are there for 9702?: Open MarkScheme to attempt a real 9702 past-paper question on Errors and uncertainties against the official scheme. Topic-tagged stems are added as we verify them.
How are Errors and uncertainties 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 Errors and uncertainties first?: Start with the free Physics lesson on Errors and uncertainties, then come back and drill past-paper questions under timed conditions.