Question

Identify the correct statement from below:

A. A will be at higher potential.
B. B will be at higher potential.
C. Both will be at the same potential.
D. Can’t be said.

Answer 1

The answer to this question is simple, if you know the concept of electric field properly and how the charge in a closed loop will affect the potential of the loop, which will help to understand how the charge is affecting the potential. This is a nice question to understand how the electric field is applied and it varies in a closed loop.

Complete solution:
We know that, in a closed loop, if the charge is increased then the potential of the closed loop will also start increasing.
With the help of the above concept, we can see that in the loop A and B shown in the diagram, the net charge in loop A is positive, which is greater than the negative net charge in loop B. So, more the positive charge, more will be the potential. So, A will be at higher potential.

Therefore, the correct answer is Option (A).

Additional Information:
In physics, Gauss's law, also known as Gauss's flux theorem, is a law relating the distribution of electric charge to the resulting electric field. In its integral form, it states that the flux of the electric field out of an arbitrary closed surface is proportional to the electric charge enclosed by the surface, irrespective of how that charge is distributed. Even though the law alone is insufficient to determine the electric field across a surface enclosing any charge distribution, this may be possible in cases where symmetry mandates uniformity of the field. Where no such symmetry exists, Gauss's law can be used in its differential form, which states that the divergence of the electric field is proportional to the local density of charge.

Note:
Electric field questions are very easy to solve if you understand the concept and how an electric field is applied in a body. These questions are common in paper’s, as this type of questions helps to understand how much understanding a student has of the topic. This is an easy topic if the concept is clear and can help to gain more marks in the exam easily.