The magnitude of an electric field between two separated plates can be calculated by the relation:
Correct answer: A. ΔV = Ed
- A. ΔV = Ed
- B. ΔV = E/d
- C. ΔV = E/qo
- D. E = d/ΔV
Explanation
The correct answer is Option A: ΔV = Ed. This formula is used to calculate the magnitude of the electric field (E) between two parallel plates, where ΔV is the voltage difference across the plates and d is the distance separating them. Option B is incorrect as it inversely relates E to d, Option C introduces an irrelevant term, qo, and Option D incorrectly inverts the relationship, suggesting an incorrect dependency of the electric field on distance and voltage.
This question appeared on the UHS MDCAT 2010 paper, which you can sit online with every answer explained.
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About Electric Field
An electric field is the force experienced per unit positive test charge, with the field of a point charge given by E = kQ/r² and directed away from positive charges or toward negative charges. Questions involve field lines, superposition and force on a charge, while electric field must be distinguished from electric potential.
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