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What is the mathematical expression for potential gradient? |
$\frac{dv}{rdr}$ $-\frac{dE}{dr}$ $-\frac{dV}{dr}$ $-\frac{dV}{dA}$ |
$-\frac{dV}{dr}$ |
The correct answer is Option (3) → $-\frac{dV}{dr}$ The mathematical expression for potential gradient (K) is - $K=\frac{v}{l}$ where, $v$ = Potential difference $l$ = length of wire |
