A 15-MH Inductor Is Connected in Series with a Battery $\varOmega$

question 12

Multiple Choice

A 15-mH inductor is connected in series with a battery and a 12- $\varOmega$ resistor,in a circuit with an open switch.0.50 ms after the switch is closed,the current in the circuit is 1.2A. What is the EMF supplied by the battery?

• A)44 V
• B)21 V
• C)3.6 V
• D)1.8 V

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