A sensitive electronic device of resistance 175
is to be connected to a source of emf by a switch. The device is designed to operate with a current of 36 mA, but to avoid damage to the device, the current can rise to no more than 4.9 mA in the first 58
sec. after the switch is closed. To protect the device it is connected in series with an inductor
What is the time constant?
What is the time constant?