Physics (AS & A Level) · Feb / March 2019 · Paper 12 · Question 30

Two horizontal parallel plate conductors are separated by a distance of 5.0 mm in air. The lower plate is earthed and the potential of the upper plate is +50 V. What is the electric field strength E at a point midway between the plates?

1. A1.0 × 10⁴ V m⁻¹ downwards
2. B1.0 × 10⁴ V m⁻¹ upwards
3. C2.0 × 10⁴ V m⁻¹ downwards
4. D2.0 × 10⁴ V m⁻¹ upwards

As printed in the paper