Question Bank MCQ • 1 Mark Section 3: Electromagnetic Theory Electromagnetic Theory - Module 4

QB_PH_085: Electromagnetic Theory - Module 4

Question Statement

The Lorenz gauge condition connecting $\mathbf{A}$ and $V$ is:
(A) \nabla \cdot \mathbf{A} + \frac{1}{c^2}\frac{\partial V}{\partial t} = 0
(B) \nabla \cdot \mathbf{A} = 0
(C) \nabla V + \frac{\partial \mathbf{A}}{\partial t} = 0
(D) \nabla^2 V = 0
Correct Answer
A
Verified Key

Step-by-Step KaTeX Derivation & Detailed Explanation

### Solution: Lorenz gauge maintains relativistic covariance: $\partial_\mu A^\mu = 0$.
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