An inductor (L = 100 mH), a resistor (R = 100 ) and a battery (E = 100 V) are initially connected in series as shown in the figure. After a long time the battery is disconnected after short circuiting the points A and B . The current in the circuit 1 ms after the short circuit is
1 A
(1/e) A
e A
0.1 A
As we learnt in
Self Inductance -
An emf is induced in the coil or the circuit which oppose the change that causes it. Which is also known back emf.
- wherein
Maximum current
The current decays for 1 millisecon = 1 x 10-3 sec
During decay ,
Option 1)
1 A
This option is incorrect
Option 2)
(1/e) A
This option is correct
Option 3)
e A
This is incorrect option
Option 4)
0.1 A
This option is incorrect
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