Physics Test 20...

If the r.m.s speed of oxygen at NTP is x m/s. If the gas is heated at constant pressure till its volume is four fold, what will be its final temperature and r.m.s speed?

Which one of the following quantities can be zero on an average for the molecules of an ideal gas in equilibrium?

The path difference between two waves y₁= A₁ sin wt and y₂= A₂ cos (wt + f) will be

At constant volume, temperature is increased then

The inputs of a NAND gate are connected together. The resultant circuit is

The path difference between two wavefronts emitted by coherent sources of wavelength 5460 Å is 2.1 micron . The phase difference between the wavefronts at that point is _

A particle of mass 10 gm lies in a potential field v = (50x²+100) J/kg. The value of frequency of oscillations in cycle/sec is

Two containers A and B are partly filled with water and closed. The volume of A is twice that of B and it contains half the amount of water in B. If both are at the same temperature, the water vapour in the containers will have pressure in the ratio of [1988]

Energy is supplied to the damped oscillatory system at the same rate at which it is dissipating energy, then the amplitude of such oscillations would become constant. Such oscillations are called

A cylindrical tube, open at both ends, has a fundamental frequency f in air. The tube is dipped vertically in water so that half of it is in water. The fundamental frequency of the air-column is now: