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A non-conducting ring of mass m and radi...

A non-conducting ring of mass m and radius R is charged as shown. The charge density, i.e. charge per unit length is `lamda`. It is then placed on a rough non-conducting horizontal plane. At time `t = 0`, a uniform electric field `E = E_0hati` is switched on and the ring starts rolling without sliding. Determine the friction force (magnitude and direction) acting on the ring when it starts moving.

A

`lambdaR E_(0)i`

B

`3lambdaRE_(0)hati`

C

`sqrt2lambdaRE_(0)hati`

D

`(2)/(lambda RE_(0))hati`

Text Solution

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The correct Answer is:
A
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