Question:

Which of the following is not the property of equipotential surfaces?

Updated On: Jun 23, 2023
  • They do not cross each other
  • They are concentric spheres for uniform electric field
  • Rate of change of potential with distance on them is zero
  • They can be imaginary spheres
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The Correct Option is B

Solution and Explanation

There is no potential gradient along any direction parallel to the surface. Any surface over which the electric potential is same everywhere is called an equipotential surface. The electric field and hence, lines of force everywhere are at right angles to the equipotential surface. This is so, because there is no potential gradient along any direction parallel to the surface and, so no electric field parallel to the surface. This means the electric field and hence, lines of force are always at right angles to the equipotential surface. Hence, they are not concentric spheres for uniform electric field. They are concentric spheres for an isolated point charge. Rest option (a), (c), (d) are properties of equipotential surface.
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Concepts Used:

Electric charges and field

What is Electric Charge

It is the property of subatomic particles that experiences a force when put in an electric and magnetic field.

What is Electric Field

It is a property associated with each point in space when charge is present in any form. The magnitude and direction of the electric field are expressed by E, called electric field strength or electric field intensity.

Electric charges are of two types: Positive and Negative. It is commonly carried by charge carriers protons and electrons.

Properties of Electric Charge

Various properties of charge include the following :-

Types of electric charge

Two kinds of electric charges are there :-

Negative Charge - When an object has a negative charge it means that it has more electrons than protons.

Positive Charge - When an object has a positive charge it means that it has more protons than electrons.

When there is an identical number of positive and negative charges, the negative and positive charges would cancel out each other and the object would become neutral.