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The charge, which will flow through a 20...

The charge, which will flow through a 200 `Omega` galvanometer connected to a 400 `Omega` circular coil of 1000 turns wound on a wooden stick 20 mm in diameter, if a magnetic field `B=0.012T` parallel to the axis of the stick decreased suddenly to zero is

A

`6.3 muC`

B

`63muC`

C

`0.63muC`

D

`630muC`

Text Solution

Verified by Experts

The correct Answer is:
A
`q=(Delta phi)/(R)=(NA(B_(2)-B_(1)))/(R)=(N pir^(2)(B_(2)-B_(1)))/(R)`
`=(1000xxpixx10^(-4)xx(0.012-0))/((200+400))`
`q=6.3xx10^(-6)C=6.3 muC`
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