Q 12-02-021NEETJEE MainEasy
The electric potential in a region is $V = 4x^2$ volt, with $x$ in metres. The electric field at $x = 1$ m is
Answer: (B) $8$ V/m along $-x$
Concept. $E_x = -\dfrac{dV}{dx}$.
Step 1. Field. $-8x = -8$ V/m at $x = 1$: $8$ V/m along $-x$.
Answer. $8$ V/m along $-x$ (Option B).
Solution by Sreeraj P, M.Sc Physics