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Physics
Electrostatic Potential and Capacitance
What is the mathematical expression for potential gradient?
$\frac{dv}{rdr}$
$-\frac{dE}{dr}$
$-\frac{dV}{dr}$
$-\frac{dV}{dA}$
The correct answer is Option (3) → $-\frac{dV}{dr}$