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A solenoid of radius R and length L has ...

A solenoid of radius R and length L has a current `I = I​_0` cosωt. The value of induced electric field at a distance of r outside the solenoid, is

A

`(mu_(0)nI_(0) omegaR^(2))/(2r)sin omegat`

B

`(mu_(0)nI_(0) omegaR^(2))/(r)sin omegat`

C

`(mu_(0)nI_(0)R^(2))/(2r) sin omega t`

D

Zero

Text Solution

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The correct Answer is:
a
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