Nuclei — Physics STD 12 Science — Question

A gas is kept in a rigid cubical container. If a load of 10kg is put on the top of the container, does the pressure increase?

What is mobility? Write its expression also.

Why there is internal resistance in any cell?

A gas is kept in an enclosure. The pressure of the gas is reduced by pumping out some gas. Will the temperature of the gas decrease by Charles's law?

Name the physical quantity which remains same for microwaves of wavelength 1mm and UV radiations of 1600 Å in vacuum.

How is a sample of an n-type semiconductor electrically neutral though it has an excess of negative charge carriers?

Consider the situation described in the previous problem. Suppose the current i enters the loop at the point A and leaves it at the point B. Find the magnetic field at the centre of the loop.

If a spherical mirror is dipped in water, does its focal length change?

Draw three equipotential surfaces corresponding to the field whose magnitude increases uniformly, but remains constant along the z-direction. How are these surfaces different from those that lie along the z- direction of a constant electric field?

If primary coil of a transformer is joined with a battery, then what will happen?