A-LevelPhysicsElectric fields9702/12 · Feb/Mar 2019 · Q301 Mark
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?
A1.0 × 10⁴ V m⁻¹ downwards
B1.0 × 10⁴ V m⁻¹ upwards
C2.0 × 10⁴ V m⁻¹ downwards
D2.0 × 10⁴ V m⁻¹ upwards
✓ Correct answer
A: 1.0 × 10⁴ V m⁻¹ downwards
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