Question

In neutral equilibrium,
A. Centre of gravity is neither raised or lowered.
B. Centre of gravity is raised
C. Centre of gravity is lowered
D. None

Answer 1

Hint: The centre of gravity is neither raised nor lowered. This type of equilibrium is known as neutral equilibrium. In the case of neutral equilibrium, the centre of gravity is at the same height.

Complete step by step answer:
An equilibrium which is independent of displacements from its original position is known as neutral equilibrium. A marble on a horizontal table is an example. There can be situations in which combination of different kinds of equilibrium. A marble on a saddle is stable for displacements toward the front or back of the saddle and unstable for displacements to the side. This is an example for this.
Here in this question neutral equilibrium is being discussed. In the case of neutral equilibrium, the height of the centre of gravity is the same. The centre of gravity is neither raised or lowered.

Therefore the correct solution for this question is option A.

Note:
Basically there are three kinds of equilibrium. These are stable equilibrium, unstable equilibrium and neutral equilibrium. A system when displaced from equilibrium, experiences a net force or torque in a direction opposite to the direction of the displacement is the stable equilibrium. A system is in unstable equilibrium, it experiences a net force or torque in the same direction as the displacement from equilibrium. If the equilibrium is independent of displacements from its original position, then it is called neutral equilibrium. Therefore the answer here is option A. If the equilibrium is independent of displacements from its original position, then it is called neutral equilibrium. Therefore the answer here is option A.