Two point charges are located at two corners of a rectangle, as shown. a.) What

Question

Two point charges are located at two corners of a rectangle, as shown.

a.) What is the electric potential difference between points A and B

B.) How much work would the electric field do (due to the two charges above) when an electron moves from point A to point B? Is the Work positive or negative

C.) What would the change in potential energy be for a proton brought in from infinity to the Point A?

Two point charges are located at two corners of a rectangle, as shown. What is the electric potential difference between points A and B How much work would the electric field do (due to the two charges above) when an electron moves from point A to point B? Is the Work positive or negative What would the change in potential energy be for a proton brought in from infinity to the Point A?

Explanation / Answer

As measurements are not given, consider length = l, breadth = b

Potential at A = 9000(-1/l +3/b)

at B = 9000(-1/b + 3/l)

Potential difference = 36000(1/b - 1/l)

A is at high potential and so electric field would do negative work which is = -36000*(1/b - 1/l)*1.6*10^-19 J

infnty to point A, Potential energy for the proton is = 9000*(-1/l +3/b)*1.6*10^-19 J

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