Question

The magnetic flux linked with a coil, in webers, is given by the equation `f=3T^(2)+4t+9`. Then the magnitude of induced e.m.f. at `t=2` second will be
A. `2` volt
B. `4` votl
C. `8` volt
D. `16` volt

Answer 1

Correct Answer - D
`e=-(dvarphi)/(dt)=-(d)/(dt)3(t^(2)+4t+9)=-(6t+4)`
`=-[6(2)+4]=-16implies|e|=16` volt