A conducing circular loop having a radius of 5.0cm, is placed perpendicular to a magnetic field of 0.50 T. It is removed from the field in 0.50 s. Find the average emf produced In the loop during this time.

Explanation

phi_1=5A=0.5 xxpi(5xx10^(-2))^(2)`
`=125xx10^(-5)`
`phi_2=0`
`E=(phi_1-phi_2)/t`
`=(125 pixx10^(-5))/(5xx10^(-1)=25 pixx10^(-4)`
`=25xx3.140010^(-4)`
`=78.5xx10^(-4)=7.8xx10^(-3)`.