A thin non-conducting ring or radius a h...

A thin non-conducting ring or radius a has a linear charge density `lambda = lambda_(0) sin phi`. A uniform electric field `E_(0) hat(i) + E_(0) hat(j)` exist in the region . .Net torque acting on ring is given as :

`E_0sqrt2 pi a^2lambda_0`

`E_0 pi a^2 lambda_0`

`2E_0 pi a^2 lambda_0`

zero

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