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1. |
For the circuit given below, the inductance measured across the terminals 1 and 2 was 15 H with open terminals 3 and 4. It was 30 H when terminals 3 and 4 were short-circuited. Both the inductors are having inductances 2H. The coefficient of coupling is ______________ |
A. | 1 |
B. | 0.707 |
C. | 0.5 |
D. | Inderminate due to insufficient data |
Answer» E. | |