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A pair of adjacent coils has a mutual in...

A pair of adjacent coils has a mutual inductance of 1.5 H. If the current in one coil changes from 0 to 20 A in 0.5 s, what is the change of flux linkage with the other coil ?

Text Solution

Verified by Experts

emf induced in second coil is,
`epsilon_2=-(dphi_2)/(dt)=-M(dI_1)/(dt) " " (because Phi_2=MI_1)`
`therefore dphi_2=M(dI_1)`
`therefore Deltaphi_2=M(DeltaI_1)`
`therefore Deltaphi_2=(1.5)(20)=30` Wb
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Knowledge Check

  • Mutual inductance of system of two coils is 0.3 H. If the current in the one coil is changed from 10A to 40A in 0.01 sec, the average induced emf in the other coil is ...... volt.

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