1.

Two coils have a mutual inductance 0.005 H. The current changes in the first coil according to equation I=I_(0) sin omega t, where I_(0)=10 A and omega = 100 pi rad/s. The maximum value of e.m.f. in the second coil is

Answer»

`pi`
`5pi`
`2PI`
`4pi`

Solution :As `|e|=M(dI)/(DT)=M(d)/(dt)(I_(0)sin OMEGA t)=MI_(0)omega cos omega t`
`therefore` Maximum e.m.f. induced,
`e_(max)=0.005xx10xx100 pi xx1=5pi`.


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