Electromagnetic Induction — JEE physics STD 12 Science — Question

Assertion : Critical angle of light passing from glass to air is minimum for violet colour.
Reason : The wavelength of blue light is greater than the light of other colours.

Assertion : The dc and ac both can be measured by a hot wire instrument.
Reason : The hot wire instrument is based on the principle of magnetic effect of current.

Assertion : Power developed in circular motion is always zero.
Reason : Work done in case of circular motion is zero.

Assertion : The average and instantaneous velocities have same value in a uniform motion.
Reason : In uniform motion, the velocity of an object increases uniformly.

Assertion : A force act upon the earth revolving in a circular orbit about the sun. Hence work should be done on the earth.
Reason : The necessary centripetal force for circular motion of earth comes from the gravitational force between earth and sun.

Assertion : Zeroth law of thermodynamic explain the concept of energy.
Reason : Energy is dependent on temperature.

Assertion : Transverse waves are not produced in liquids and gases.
Reason : light waves are transverse waves.

Assertion : The crystalline solids have a sharp melting point.
Reason : All the bonds between the atoms or molecules of a crystalline solids are equally strong, that they get broken at the same temperature.