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The magnetic field at the centre of the ...

The magnetic field at the centre of the MCG is 0.25 T. The coil has an area of `0.2 m^2` and has 28 turns. If the sensitivity of the MCG is to be increased by 25%, thenumber of turns of the coil should be …….Assume all other things remaining constant

A

30

B

32

C

25

D

38

Text Solution

Verified by Experts

The correct Answer is:
C
`B=0.25T,A=0.2m^2,n_1=28,S_2=1.25S_1,n_2=?`
`S=(n AB)/(K)`
`therefore S prop n `
`(n_2)/(n_1)=(S_2)/(S_1)`
`n_2=(1.25S_1)/(S_1)xx n_1=1.25xx28=35`.
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