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A condenser is charged using a constant ...

A condenser is charged using a constant current. The ratio of the magnetic field at a distance of `(R )/(2)` and `R` from the axis of condenser (`R` is the radius of plate) while charging is

A

`1: 1 `

B

`2: 1`

C

`1: 2`

D

`1: 4`

Text Solution

Verified by Experts

The correct Answer is:
C
r `gt` R B = `(mu_(0) I_(0)r)/(2 pi R^(2) ) , r = R B = (mu_(0) I_(d))/(2 pi R)`
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