A positive charge might be placed at one of two different locations in a region

Question

A positive charge might be placed at one of two different locations in a region where there is a uniform electric field, as shown below. How do the electric forces on the charge at positions 1 and 2 compare0 Force on the charge is greater at 1. Force on the charge is greater at 2. Force at both positions is zero. Force at both positions is the same but not zero. Force at both positions has the same magnitude but is in opposite directions. The figure below shows a hollow conducting metal sphere which was given initially an evenly distributed positive (+) charge on its surface. Then a positive charge -Q was brought up near the sphere as shown. What is the direction of the electric field at the center of the sphere after the positive charge +Q is brought up near the sphere? Left Right Up Down Zero field

Explanation / Answer

12 )

Relative magnitude of Electric field is given by the intensity of electric lines of force at a point.

At point 1 and 2 the intensity of electric lines of force seems to be equal . So electric field is same at both

So, electric force will be same at both

So, option d is correct

13)

Due to Gauss theorem, electric sheilding causes the electric field at the center to be 0.

So, answer is e) Zero field

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