Artifical magnets are made inm different shaper such as____.and _____.

The atmosphere is made of _______different layers.

Core of electro magnets are made of ferromagnetic material which has:

What are gums made of? Is Fevicol different?

Give any four different shapes of artificial magnets.

Two solid spheres of the same mass are made of metals of different densities. Which of them has a large moment of inertia about the diameter?

A plano-convex lens fits exactly into a plano-concave lens. Their surfaces are parallel to each other if the lenses are made of different materials. Will the combination act as a lens? If so, what is its focal length? Is it convergent or divergent ?

Two cylinders P and Q have the same length and diameter and are made of different materials having thermal conductivities in the ratio 2:3. These two cylinders are combined to make a cylinder. One end of P is kept at 100°C and another end of Q at 0°C. The temperature at the interface of P and Q is

Man-made magnets are called ____magnets.

A Plano-convex lens fits exactly into a plano-concave lens. Three plane surfaces are parallel to each other. If lenses are made of different material of refraction indexes and R is the radius of curvature of the curved surface of the lenses ,then the focal length of the combination