The induced e.m.f. if the current falls from 9A to 4A in 0.05S.

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The induced e.m.f. if the current falls from 9A to 4A in 0.05S.




A circuit has 1,000 turns enclosing a magnetic circuit 20cm2 in section. With 4A, the flux density is 10 Wb/m2 and with 9 A it is 1.4 Wb/m2. Find the mean value of the inductance between these current limits and the induced e.m.f. if the current falls from 9A to 4A in 0.05S.



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