A40-mh ideal inductor is connected in series with a 50 ω resistor through an ideal 15-v dc power supply and an open switch. if the switch is closed at time t = 0 s, what is the current 7.0 ms later? o 650 ma o 850 ma o 300 ma o 280 ma o 550 ma

i=300 mA

Explanation:

Given

inductance(L)=40 mH

Resistor(R)=

Voltage(V)=15 V

Time constant()=

current

Current as a function of time is given by

i= 299.95 mA

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