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The magnetic field strength B at the poi...

The magnetic field strength B at the point between the capacitor plates is indicated in figure. B in terms of the rate of charge of the electric field strength, i.e., dE/dt between the plates is equal to

A

`(mu _(0))/( 2pi r ) (dE)/(dt)`

B

`(epsi _(0) mu _(0)r)/(2) (dE)/(dt)`

C

Zero

D

`(mu_(0))/(2r) (dE)/(dt)`

Text Solution

Verified by Experts

The correct Answer is:
B
`B = (mu _(0))/( 4pi ) (2 I _(D))/( r ) = (mu _(0) )/( 4pi ) 2/r xx epsi _(0) (d phi E)/( dt)`
`= (mu _(0))/( 2pi r ) epsi _(0) (d )/(dt) (E pi r ^(2)) = (mu_(0) epsi _(0) r )/(2) (dE)/(dt)`
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