(Q) The charge per unit length of four quadrant of a ring of radius R is 2λ, -2λ, λ and -λ respectively. The electric field at the centre is
(a) −(λ ÷ 2∏ε R) î
(b) (λ ÷ 2∏ε R) j
(c) (√2λ ÷ 4∏ε R) î
(d) None of the above
(Q) The charge per unit length of four quadrant of a ring of radius R is 2λ, -2λ, λ and -λ respectively. The electric field at the centre is
(a) −(λ ÷ 2∏ε R) î
(b) (λ ÷ 2∏ε R) j
(c) (√2λ ÷ 4∏ε R) î
(d) None of the above