APFIVE Induced Electric Field in a Solenoid
A long solenoid with n turns per unit length carries a time-varying current given by I(t) = I₀sin(ωt). What is the magnitude of the induced electric field at a distance r from the central axis inside the solenoid?
A
μ₀nI₀ω sin(ωt)/2
B
μ₀nI₀ωr sin(ωt)/2
C
μ₀nI₀ωr cos(ωt)/2
D
μ₀nI₀ω cos(ωt)/(2πr)
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