The gradient of the magnetic vector potential can be expressed as(a) –με dV/dt(b) +με dE/dt(c) –με dA/dt(d) +με dB/dtThis question was posed to me during an online interview.This key question is from Maxwell Law in Time Varying Fields topic in chapter Maxwell Equations of Electromagnetic Theory

The gradient of the magnetic vector potential can be expressed as(a) �

1.	The gradient of the magnetic vector potential can be expressed as(a) –με dV/dt(b) +με dE/dt(c) –με dA/dt(d) +με dB/dtThis question was posed to me during an online interview.This key question is from Maxwell Law in Time Varying Fields topic in chapter Maxwell Equations of Electromagnetic Theory
Answer» Right answer is (a) –με dV/dt To explain: The GRADIENT of A is the RATIO of the NEGATIVE gradient of electric potential to the speed of LIGHT C. We can write c = 1/√(με). Thus grad(A) = -με dV/dt is the required expression.

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