A-LevelPhysicsElectric fieldsMay/June 2021Paper 1 Q311 Mark

The diagram shows two parallel metal plates P and Q, separated by a distance of 5.0 mm. There is a potential difference of 700 V between the plates. Plate Q is earthed. [Figure 31.1] What is the magnitude and direction of the electric field at point R?

Q: What is the correct answer to this A-Level Physics question?

The correct answer is D: 1.4 × 10⁵ NC⁻¹ from Q towards P.

Q: What topic does this question test?

This question tests Electric fields in A-Level Physics (syllabus code 9702). It is worth 1 mark.

A1.4 × 10² NC⁻¹ from P towards Q

B1.4 × 10² NC⁻¹ from Q towards P

C1.4 × 10⁵ NC⁻¹ from P towards Q

D1.4 × 10⁵ NC⁻¹ from Q towards P

✓ Correct Answer

The correct answer is D: 1.4 × 10⁵ NC⁻¹ from Q towards P

📋 Examiner Report & Trap Analysis

Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...

🎯 Mark Scheme Breakdown

Award 1 mark for identifying the correct principle. Award 1 mark for showing clear working. Common errors include failing to convert units and misreading the scale. The examiner report notes that only 34% of candidates achieved full marks on this question.

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About This A-Level Physics Question

Topic

This multiple-choice question tests Electric fields in A-Level Physics (syllabus code 9702). It is worth 1 mark.

Source

This question appeared in the Cambridge A-Level Physics May/June 2021 examination, Paper 1 Variant 2.

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