A Long Line of Charge with Charge Per Unit Length

question 39

Multiple Choice

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?

• A)the positive z-direction
• B)halfway between the x-direction and the y-direction
• C)the negative z-direction
• D)all directions are possible parallel to the x-y plane
• E)cannot be determined

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