1.

The given loop is kept in a uniform magnetic field perpendicular to the plane of the loop. The field changes from 1000 Gauss to 500 Gauss in 5 seconds. The average induced emf in the loop is

Answer»

`28muV`
`30muV`
`48 muV`
`56 muV`

Solution :
Area of loop `A=(16xx4-4xx2)`
=64-8
`=56 "CM"^2`
`=56xx10^(-4) m^2`
`dB=(500-1000)xx10^(-4)` T
`=-500xx10^(-4)` T
`THEREFORE` Induced emf `EPSILON=(AdB)/(DT)`
`=(56xx10^(-4)xx(-500xx10^(-4)))/5`
`=56xx10^(-6)` V
`=56 muV`


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