A long line of charge with charge per unit length ?1 is located on the x-axis and another long line of charge with charge per unit length ?2 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 ?1 and ?2 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
A
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