Physics Test - 1

_______is a branch of physics in which heat engine and refrigerator efficiency is studied.

A circular track of radius ‘R’ is in a vertical plane. AB is a vertical diameter. The work done in moving a mass of ‘m’ along the path ACB is (g = acceleration due to gravity)

Four spheres of uniform density and having masses 1 kg, 3 kg, 2 kg and 4 kg are situated as shown in the figures. Find the co–ordinates of the centre of mass of the system.

A particle is at x = 5 m at t = 0, x = -7 m at t = 6 s and x = +2m at t = 10 s. The average velocity of the particle during the intervals (a) t = 0 to t = 6 s (b) t = 6 s to t = 10 s, (c) t = 10 s, is respectively

If the density of moon is d, the time period of revolution of an artificial satellite in a circular orbit very close to the surface of the moon is

The time period of a particle performing linear SHM is 12s. The time taken by it to make a displacement equal to half its amplitude is

The elongation of a spring of length 'L' and of negligible mass due to a force is 'x'. The spring is cut into two pieces of lengths in ratio 1 : n. The ratio of the respective spring constants is :

A U-tube has two vertical limbs of diameters 4mm and 5mm. When water is poured into it, the water level difference between the limbs is (T = 70 dyne cm^-1) (g = 10ms^-2)

1cc of water at 100°C is given 540 cal of heat and the steam formed occupies 1671cc. at 1 atm pressure. Then work done against atmospheric pressure in this process is nearly

28 gm of N₂ gas is contained in a flask at a pressure of 10 atm and at a temperature of 57°C. It is found that due to leakage in the flask, the pressure is reduced to half and the temperature reduced to 27°C. The quantity of N₂ gas that leaked out is