an RL circuit has a switch as shown below. First switch a is closed and the circ
ID: 1898598 • Letter: A
Question
an RL circuit has a switch as shown below. First switch a is closed and the circuit is allowed to reach equilibruim, then switch b is closed and the circuit is again allowed to reach equilbrium. Once switch b is closed, the current in the RL cirucit drops from 1.0A to 10ma in the first second following removal of the emf from the cirucit. Assume L is 10 H and answer the questions :
1 What is the resistance R in the cirucit ?
2- What is the voltage accross the inductor, a long time after the switch a has been closed.
3- indicate the direction of seld induced current.
Explanation / Answer
the figure is needed :(
V = V0 e^(-t/LR)
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