Nuclei — Physics STD 12 Science — Question

Name the electromagnetic waves which :
(a) are useful in removing tension in musceles.
(b) are absorbed by ozone layer in atmosphere.

If the angle between the pass axis of polarizer and the analyser is 45°, write the ratio of the intensities of original light and the transmitted light after passing through the analyser.

Name the electromagnetic radiations used for studying the crystal structure of solids.

State the reason, why Ga As is most commonly used in making of a solar cell.

A plane loop of rectangular shape is moved in such a uniform magnetic field which is perpendicular to the plane of the loop. What is the direction and magnitude of induced current in the loop?

Name two factors by which voltage sensitivity of a galvanometer can be increased.

If length, number of turns and current flowing through a solenoid are made doubled, then how many times will magnetic field becomes?