The current in a coil of self-inductance of 4 H changes from 10 A to 2 – McqOptions

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1.	The current in a coil of self-inductance of 4 H changes from 10 A to 2 A in t seconds and the induced e.m.f. is 40 V. The time t is
A.	0.2 s
B.	0.4 s
C.	0.6 s
D.	0.8 s
Answer» E.

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