Question

4) A battery (DC battery) is connected in series to a 14 milli-henrie inductor and a...

4) A battery (DC battery) is connected in series to a 14 milli-henrie inductor and a 4 Ohm resistor. After 6 milli-seconds, the battery is disconnected. 5 milli-seconds after the battery has been disconnected, the current in the circuit is 3.8 amps. What was the voltage of the battery that was disconnected in volts?

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Answer #1

Use the equation for current in an LR circuit with and without the battery to find the required voltage of the battery after finding the time constant as shown below

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