The magnetic flux passing through a coil changes from
`5 xx 10^(-2)` wb to `8xx 10^(-2)` wb in 0.15 second. Calculate the magnitude of emf induced in the coil.

Explanation

`phi_(2)=8xx10^(-2)"wb"`
`phi_(1)=5 xx10^(-2)"wb"`
dt = 0.15 s
Induced emf = e = ?
`e= - ((phi_(2)-phi_(1)))/(dt)`
`=((8 xx 10^(-2)-5 xx 10^(-2)))/(0.15)`
`= - ((8-5)xx 10^(-2))/(0.15)`
`= - (3)/(0.15)xx 10^(-2)`
`= - (1)/(0.05)xx 10^(-2)`
`implies" " e= - 0.2 ` volt