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_(0) sqrt2 pi a^(2) lambda_(0)`

`E_(0) pi a^(2) lambda_(0)`

`2 E_(0) pi a^(2) lambda_(0)`

Zero

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