A potential difference of 250 V is applied across two parallel plates 5.0 mm apart. What is the electric field between them?
Correct answer C. 5.0 × 10⁴ V/m
Explanation
For a uniform field E = V/d = 250 / (5.0 × 10⁻³ m) = 5.0 × 10⁴ V/m. Forgetting to convert millimetres to metres gives 50 V/m.
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