A 13-V Battery Is Connected in Series with a Switch,resistor

question 69

Multiple Choice

A 13-V battery is connected in series with a switch,resistor and coil.If the circuit's time constant is 1.2 × 10−⁴ s and the final steady current after the switch is closed becomes 2.5 A,what is the value of the inductance?

• A)3.9E-3 H
• B)6.2E-4 H
• C)2.3E-1 H
• D)2.7E-3 H
• E)2.3E-5 H

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