Physics · Electrodynamics
If the electric and magnetic fields remain unchanged under a gauge transformation when the vector potential changes according to A → A + 3r̂, where r = r(t)r̂, then the scalar potential Φ must simultaneously change to:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Φ - r
- 2Φ - ∂r/∂t
- 3Φ - 3∂r/∂t✓
- 4Φ - 2∂r/∂t
Correct answer
Φ - 3∂r/∂t
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