A small piece of metal wire is dragged across the gap
between this poles of a magnet in 10 s. The
magnetic flux between the pole pieces is `8 xx 10^(-4)` wb. Find
The magnitude of induced emf.

Explanation

`d phi=8xx10^(-4)"wb"`
dt=10 s
Induced emf =e=?
`e=|-(d phi)/(dt)|` ( In magnitude)
`e=(8 xx 10^(-4))/(10)`
`e=8 xx 10^(-5)`"volt"