Which is true?
(a) The potential and the electric field are zero along AB and CD
(b) The potential is zero along the lines AB and CD
(c) The potential is zero along the line AB with an electric field along CD
(d) The electric field is zero along lines AB and CD
(e) The potential is zero along the line CD with an electric field along AB
Here, all the given charges are at the same distance from the lines AB and AC. Consider the distance of the charges from these lines be r.
Calculate the potential along the line AB and CD, respectively.
Consider the diagram for the electric field along the line AB.
Here, the net electric field along the line AB will not be zero, because the electric fields (E1 and E2) on both sides of the line will be the same, that is the non-zero electric field.
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