NEET Physics Electric Potential MCQ Question
Consider a diagram showing two closely spaced equipotential surfaces A and B, where A has potential V and B has potential V + dV. If a unit positive charge is moved from surface B to surface A against the electric field, which of the following expressions correctly represents the electric field E in terms of potential difference and distance?
E = -dV/dl
E = dV/dl
E = dl/dV
E = -dl/dV
Correct Answer
Detailed Explanation
The electric field E is related to the potential difference dV and the perpendicular distance dl as E = -dV/dl, representing the work done per unit charge moving against the field.
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