Physics Test - ...

In a circuit \(20 \Omega\) resistance and \(0.4 \mathrm{H}\) inductance are connected with a source of \(220\) volt of frequency \(50 \mathrm{~Hz},\) then the value of phase angle \(\theta\) is:

A magnetising field of \(1500 \mathrm{A} \mathrm{m}^{-1}\) produces flux of \(2.4 \times 10^{-5}\) weber in a iron bar of the cross-sectional area of \(0.5 \mathrm{~cm}^{2}\). The permeability of the iron bar is

The unit of which of the following is meter?

When we rub a glass rod with silk, then the charge on the glass rod will be:

A force \(F=P y^{2}+Q y+R\) acts on a body in the y direction. The change in kinetic energy of the body during a displacement from \(y=-a\) to \(y=a\) is:

A closely wound solenoid of \(800\) turns and area of cross section \(2.5 \times 10^{-4} \mathrm{~m}^{2}\) carries a current of \(3.0 \mathrm{~A}\). What is its associated magnetic moment?

In Maxwell Boltzmann distribution, the fraction of gas molecules having energy between \(E\) and \(E + dE\) is proportional to:

A mass of 5 kg is moving along a circular path of radius 1 m. If the mass moves with 300 revolutions per minute, its kinetic energy would be:

The loudness and pitch of a sound depends on:

A thermodynamic system is taken through the cycle \(A B C D\) as shown in the figure. Heat rejected by the gas during the cycle is: