A 12-V Battery Is Connected in Series with a Switch

question 30

Multiple Choice

A 12-V battery is connected in series with a switch, resistor, and coil. If the circuit's time constant is 2.0 *10^-4 s and the final steady current after the switch is closed becomes 2.0 A, what is the value of the inductance?

• A) 2.4 mH
• B) 48 mH
• C) 9.6 mH
• D) 1.2 mH

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