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Questions  

The magnetic flux of 500μWb per turn passing through a 200 turn coil is reversed in 20×10-3 seconds. The average e.m.f. induced in the coil in volt is

a
2.5
b
5.0
c
7.5
d
10.0

detailed solution

Correct option is D

ϕ=500×10−6Wb,N=200, t=20×10−3s Given that coil is reversed∴e=2Nϕt=2×200×500×10−620×10−3=10V

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Similar Questions

The  magnetic flux ϕ through a coil varies with time t as shown in Fig.

Which graph shown in Fig. best represents the variation of induced emf e in the coil with time t.


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