Question

A rectangular loop of sides 6 cm 2 cm with a samll cut is moving out of a region of uniform magnetic field of magnitude 0.4 T direction normal to the loop. The voltage developed acrss the cut if velocity of loop is `2cm^(-1)` in a direction normal to the longer side is
A. `3.8xx10^(-4)V`
B. `4.8xx10^(-4)V`
C. `2.2xx10^(-2)V`
D. `3.2xx10^(-2)V`

Answer 1

Correct Answer - D
Here, `l=6cm, 6xx10^(-2)m`
`B=0.4`
`v=2cm s^(-1)`
`=2xx10^(-2)m s^(-1)`
Voltage developed is `epsi=Blv=0.4xx6xx10^(-2)xx2xx10^(-2)`
`=4.8xx10^(-4)V`