For a circular ring, centre of gravity lies

The centre of gravity

A positive charge Q is uniformly distributed along a circular ring of radius. A small test charge q is placed at the centre of the ring. Then A. If qgt0 and is displaced away from the centre in the plane of the ring., it will be pushed bactowards the centre. B. If qlt0 and is displced away from the centre in the plane of the ring, it will never return no the centre and will continue moving til it hits the ring. C. If qlt0 , it will performe SHM for small displacement along the axis. D. Q at the centre of the ring is in an unstable equilibrium within the plane of the ring for qgt0

M is mass and R is radius of a circular ring. The moment of inertia of same ring about an axis in the plane of ring at a perpendicular distance 2R/3 from centre of ring is

Where does the position of centre of gravity lie for (1) A circular lamina (2) A triangular lamina

Assertion: Centre of mass of a rigid body always lies inside the body. Reason: Centre of mass and centre of gravity coincide if gravity is uniform.

A ring of radius 'R' having change 'q' uniformly distributed over it passes through a sphere lies at circumference of ring the centre of ring lies at surface of sphere.Then flux linked with sphere is

What is the radius of gyration for (a) circular ring and (b) circular disc about an axis passing through the centre and perpendicular to their planes ?

A and B are two points on a circular ring made of uniform wire of resistane R. If the part AB of the ring subtends an angle theta at the centre C of the ring as shown below, find the resistance of the ring between the points A and B.