An alternating current `I` in an inductance coil varies with time `t` according to the graph as shown: Which one of the following graph gives the variation of voltage with time?

Options

A.
B.
C.
D.

Answer

B

Explanation

`v= -L (di)/(dt)`
from graph we can see that `(di)/(dt) =` constant but its value is initally negative & then it become positive
`therefore` in graph V forst remain negative and them become positive.