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1. |
In a transformer, the coefficient of mutual inductance between the primary and the secondary coil is 0.2 henry. When the current changes by 5 ampere/second in the primary, the induced e.m.f. in the secondary will be [MP PMT 1989] |
A. | 5 V |
B. | 1 V |
C. | 25 V |
D. | 10 V |
Answer» C. 25 V | |