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

Options

A. `lambdaR E_(0)i`
B. `3lambdaRE_(0)hati`
C. `sqrt2lambdaRE_(0)hati`
D. `(2)/(lambda RE_(0))hati`

Answer

A