Question

A straight, nonconducting plastic wire 9.00 long carries a charge density of 125 distributed uniformly along its length. It is lying on a horizontal tabletop.

Answer 1

Electric field due to the ring charge is given by theexpression

Qx

radius of the ring, R = L / 2π = 0.09 /2π m

charge of the ring, Q = λ L = 125 x 10 ^-9 x0.09 = 11.25 C

distance on the perpendicular axis from the plane of theloop,

x = 0.06m

1 / 4πε = 9 x 10 ⁹

plug the values in the above expression for the electric fieldand get the final answer.

Answer 2

Electric field due to the ring charge is given by theexpression

Qx

radius of the ring, R = L / 2π = 0.09 /2π m

charge of the ring, Q = λ L = 125 x 10^-9 x0.09 = 11.25 C

distance on the perpendicular axis from the plane of theloop,

x = 0.06m

1 / 4πε = 9 x 10⁹

plug the values in the above expression for the electric fieldand get the final answer.