Physics

Problem

Charge

Q

is distributed uniformly on length '

l

' of a wire. It is bent in form of semicircle. The electric field strength near the centre of arc is (a)

\frac{Q\pi}{4\epsilon_0 l^2}

(b)

\frac{Q}{4\pi\epsilon_0 l^2}

(c)

\frac{Q}{2\pi\epsilon_0 l^2}

(d)

\frac{Q}{2\epsilon_0 l^2}