13. A circuit consist of a batter with an EMF of 25 V, a capacitor with C= 60e-6 F, and a resistor with R = 70 ohms. The capacitor is initially uncharged and the switch in the circuit it open. What is the current in the circuit 2 ms (milliseconds) after the switch has been closed?
A) 0.135 A
B) 0.429 A
C) 0.490 A
D) 0.533 A
E) 0.222 A
Answer is E. Not sure why. Please help!
Time constant of circuit is
When the circuit is closed, then capacitor get charged. Charging of capacitor will be given as
Hence current will be
13. A circuit consist of a batter with an EMF of 25 V, a capacitor with...
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