When magnetic flux through a coil is changed, the variation of induced current in the coil with time is as shown in graph. If resistance of coil is 10 W, then the total change in flux of coil will be
Answer & explanation
Correct answer: option 3
$ \text{Change in flux } \Delta \phi = E.\Delta t = RI\Delta t = 10 \times \frac{1}{2} \times 4 \times 0.1 = 2Wb$