Question

Select the correct non-conservative force from the following options?

• A. Force of friction
• B. Magnetic force
• C. Gravitational force
• D. Electrostatic force

Answer 1

The correct option is A

Force of friction

Step 1: Explanation of the correct option

In the case of option A,

1. A non-conservative force is one whose work is dependent on the path taken.
2. Force of conservative is an example of friction force.
3. Thermal energy is dissipated when work is done by friction. The energy lost cannot be recovered completely.
4. The frictional force is the force that arises when two surfaces come into contact and slide against each other.

Step 2: Explanation for the incorrect options

In the case of option B,

1. Magnetic force is the attraction or repulsion force that exists between electrically charged particles as a result of their motion.
2. It is the fundamental force behind phenomena such as the action of electric motors and the attraction of magnets to iron.

In the case of option C,

1. It is the force exerted by the Earth on all objects that are near or on its surface.
2. Gravitational force, for example, causes an apple to fall from a tree branch to the ground.

In the case of option D,

1. The electrostatic force is a force of attraction or force of repulsion which caused by the electric charges of particles. This is basically the electric force that exists between two stationary charged bodies.
2. It is also known as Columb's force.

Hence, option A is the correct option.