First slide

Inductance

Question

The resistance in the following circuit is increased at a particular instant. At this instant the value of resistance is 10 $Ω$ . The current in the circuit will be now

Moderate

A

i=0.5A
B

i>0.5A
C

i<0.5A
D

i=0

Solution

If resistance is constant ( 10 $Ω$ ) then steady current in the circuit i = 5/10 : 0.5A. But resistance is increasing it means current through the circuit start decreasing. Hence inductance comes in picture which induces a current in the circuit in the same direction of main current. So i > 0.5 A.

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