Physics · Electromagnetic Induction
A small circular wire loop of radius a is located at the center of a much larger coplanar circular wire loop of radius b (b >> a). The larger loop carries an alternating current I = I0 cos(ωt), where I0 and ω are constants. The electromotive force (emf) induced in the small loop is approximately equal to:
- 1πμ0I0aω2b2 cos(ωt)
- 2πμ0I0aω2b2 sin(ωt)
- 3πμ0I0a2ω2b sin(ωt)✓
- 4πμ0I0a2ω2b cos(ωt)
Correct answer
πμ0I0a2ω2b sin(ωt)
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