A long line of charge with charge per unit length λ1 is located on the x-axis and another long line of charge with charge per unit length λ2 is located on the y-axis with their centers crossing at the origin. In what direction is the electric field at point z = a on the positive z-axis if λ1 and λ2 are positive?

Question

Quizplus · Accepted Answer

The electric field due to each line of charge is directed radially outward from the line. At point z = a on the positive z-axis, the fields from both lines will have components in the positive z-direction, resulting in a net electric field in the positive z-direction.

A Long Line of Charge with Charge Per Unit Length