Question

The graph shows the variation in magnetic flux $\varphi \left(t\right)$ with time through a coil. Which of the statement given below is not correct.


(correct answer + 2, wrong answer - 0.50)

• A. There is a change in the direction as well as magnitude of the induced emf between A and D.
• B. The magnitude of the induced emf is zero at D.
• C. There is a change in the direction as well as magnitude of induced emf between A and E.
• D. The induced emf is zero at B.

Answer 1

The correct option is D The induced emf is zero at B.


In the given graph, at point B, flux is maximum, and then the function is discontinuous. So we can say that $|e|=\frac{d\varphi }{dt}$ at B $\ne 0$
So, the induced emf will not be zero at B.