2
Question
Coil of 800 turns of effective area 0.05 m2 is kept perpendicular to a magnetic field of magnitude 5×10−5 T. When the plane of the coil is rotated by 90°around any of its coplanar axis in 0.1 s, the emf induced in the coil will be
Coil of 800 turns of effective area 0.05 m2 is kept perpendicular to a magnetic field of magnitude 5×10−5 T. When the plane of the coil is rotated by 90°around any of its coplanar axis in 0.1 s, the emf induced in the coil will be
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Solution
The correct option is D 0.02 V
Given
N = 800, A = 0.05 m2, B = 5×10−5TΔt = 0.1 s e = −(Φf−Φi)Δt = −(NBAcos(900) − NBAcos(00) )Δt = −(0 − NBA )Δt = 800×5×10−5×5×10−20.1 = 0.02 V
Given
N = 800, A = 0.05 m2, B = 5×10−5TΔt = 0.1 s e = −(Φf−Φi)Δt = −(NBAcos(900) − NBAcos(00) )Δt = −(0 − NBA )Δt = 800×5×10−5×5×10−20.1 = 0.02 V
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