Q. The resistance in the following circuit is increased at a particular instant. At this instant the value of resistance is $10\Omega$. The current in the circuit will be
A) $i = 0.5\ A$
B) $i > 0.5\ A$
C) $i < 0.5\ A$
D) $i = 0$
Explanation
(b) If resistance is constant $(10\Omega)$ then steady current in the circuit $i = \frac{5}{10} = 0.5\ A$. But resistance is increasing it means current through the circuit starts decreasing. Hence inductance comes in picture which induces a current in the circuit in the same direction of main current. So $i > 0.5\ A$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.