Question

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

• A. i = 0.5 A
• B. i > 0.5 A
• C. i < 0.5 A
• D. i = 0

Answer 1

The correct option is B i > 0.5 A

If resistance is constant $\left(10\Omega \right)$ then steady current in the circuit $i=\frac{5}{10}=0.5$A . 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.