Q.
The cu$rrent$ $i$ in an inductance coil varies with time $t$ according to the graph shown in fig. Which one of the following plots shows the variation of voltage in the coil with time
A) [image:6_image45.emf]
B) [image:6_image46.emf]
C) [image:6_image47.emf]
D) [image:6_image48.emf]
Explanation
(c) According to $i - t$ graph, in the first half current is increasing uniformly so a constant negative emf induces in the circuit
In the second half current is decreasing uniformly so a constant positive emf induces
Hence graph $(c)$ is correct
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.