Changing magnetic flux through a closed loop induces an emf of magnitude V. Find the work done in carrying charge Q once around the loop.
Options

Question

Changing magnetic flux through a closed loop induces an emf of magnitude V. Find the work done in carrying charge Q once around the loop.

G1 Physics · Accepted Answer

Step 1: Faraday's law connects induced emf to changing magnetic flux: ∮E⃗·dℓ⃗ = −dΦ/dt. Step 2: To transport a charge Q once around the loop, electrical work W = Q∮E⃗·dℓ⃗. Step 3: If the induced emf is V, magnitude W = QV joules; answer A. Final answer: (A) QV.