1. Tardigrade
  2. Question
  3. Physics
  4. The current i in a coil varies with time as shown in the figure. The variation of induced emf with time would be

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. The current $i$ in a coil varies with time as shown in the figure. The variation of induced emf with time would bePhysics Question Image

AIPMTAIPMT 2011Electromagnetic Induction

Solution:

We know induced induced emf $e=-L \frac{d i}{d t}$
During 0 to $\frac{T}{4}, \frac{d i}{d t}=$ constant
so, induced emf $e=-v e$
for $\frac{T}{4}$ to $\frac{T}{2}, \frac{d i}{d t}=0$
induced emf $e=0$
For $\frac{T}{2}$ to $\frac{3 T}{4}, \frac{d i}{d t}=$ constant
sol induced emf $e=+v e$