Assume two charges q and -q are placed at the points (0,0, -d/2) and (0,0, d/2)
ID: 1274957 • Letter: A
Question
Assume two charges q and -q are placed at the points (0,0, -d/2) and (0,0, d/2) respectively.
(a) What is the electric field at points on the xy-plane (i.e z = 0 plane)?
(b) Use the electric field in part (a) to calculate the electric flux through the xy-plane.
(c) Discuss the result of part (b) using what you know about the total electric flux of a charge q and the principle of superposition.
(d) Using the argument in part (c), find the electric flux through an infinite plane parallel to the xy-plane at z = d/4? What is the electric flux if the plane is at height z = 2d?
Explanation / Answer
a)kq2 /d2
b) 2q/epslon 0
c) 2q/epsilon0,because electri lines of force coming towards the -q of the multiple of 2 amount:;1 for q and other for -q.
d) 2q/epsilon0,because electri lines of force coming towards the -q of the multiple of 2 amount:;1 for q and other for -q.
zero at z=2d,because of the total electric lines of coming and going is equal......so net is zero.