The flux linked with a circuit is given by `phi=t^(3)+3t-7`. The graph between time (x-axis) and induced emf (y-axis)will be a

Options

A. straight line through the origin
B. straight line with positive intercept
C. straight line with negative intercept
D. parabola not through the origin

Explanation

`phi=t^(3)+3t-7`
`therefore` Induced emf
`e=(dphi)/(dt)=-(3t^(2)+3)=-3t^(2)-3`
Att = 0 , e =- 3V
Therefore , shape of graph will be a parabola not through origin .