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A battery (DC battery) is connected in series to a 13 milli-henrie inductor and a 6...

A battery (DC battery) is connected in series to a 13 milli-henrie inductor and a 6 Ohm resistor. After 6 milli-seconds, the battery is disconnected. 3 milli-seconds after the battery has been disconnected, the current in the circuit is 2.3 amps. What was the voltage of the battery that was disconnected in volts?

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