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Physics (AS & A Level) · May / June 2021 · Paper 12 · Question 31

9702Uniform electric fields

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. What is the magnitude and direction of the electric field at point R?

  1. A1.4 × 10² N C⁻¹ from P towards Q
  2. B1.4 × 10² N C⁻¹ from Q towards P
  3. C1.4 × 10⁵ N C⁻¹ from P towards Q
  4. D1.4 × 10⁵ N C⁻¹ from Q towards P

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Correct answer: D. 1.4 × 10⁵ N C⁻¹ from Q towards P

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