Heating and Chemical Effect of Current — JEE physics STD 12 Science — Question

Assertion : In adiabatic compression, the internal energy and temperature of the system get decreased.
Reason : The adiabatic compression is a slow process

Assertion : The work done in bringing a body down from the top to the base along a frictionless incline plane is the same as the work done in bringing it down the vertical side.
Reason : The gravitational force on the body along the inclined plane is the same as that along the vertical side.

Assertion : In case of bullet fired from gun, the ratio of kinetic energy of gun and bullet is equal to ratio of mass of bullet and gun.
Reason : In firing, momentum is conserved.

Assertion : A dish antenna is highly directional.
Reason : This is because a dipole antenna is omni directional.

Assertion : Within a glass slab, a double convex air bubble is formed. This air bubble behaves like a converging lens.
Reason : Refractive index of air is more than the refractive index of glass.

Assertion : Thermocouple acts as a heat engine.
Reason : When two junctions of thermocouple are at different temperature, thermo e.m.f. is produced.

Assertion : An N-type semiconductor has a large number of electrons but still it is electrically neutral.
Reason : An N-type semiconductor is obtained by doping an intrinsic semiconductor with a pentavalent impurity.

Assertion : The instantaneous power of an agent is measured as the dot product of instantaneous velocity and the force acting on it at that instant.
Reason : The unit of instantaneous power is watt.

Assertion : The heat supplied to a system is always equal to the increase in its internal energy.
Reason : When a system changes from one thermal equilibrium to another, some heat is absorbed by it.

Assertion : A light body and heavy body have same momentum. Then they also have same kinetic energy.
Reason : Kinetic energy does not depend on mass of the body.