Physics Test - ...

A solid cylinder of mass 2 kg and radius 4 cm rotating about its axis at the rate of 3 rpm. The torque required to stop after 2π revolutions is

The moment of the force, \(\overrightarrow{\mathrm{F}}=4 \hat{\mathrm{i}}+5 \hat{\mathrm{j}}-6 \hat{\mathrm{k}}\) at \((2,0,-3),\) about the point \((2,-2,-2),\) is given by

\(1 kg\) of water at \(100^{\circ} C\) is converted into steam at \(100^{\circ} C\) by boiling at atmospheric pressure. The volume of water changes from \(1.00 \times 10^{-3} m ^3\) as a liquid to 1. \(671 m ^3\) as steam. The change in internal energy of the system during the process will be (Given latent heat of vaporisation \(=2257 kJ / kg\), Atmospheric pressure \(\left.=1 \times 10^5 Pa \right)\)

For a photosensitive surface, work function is \(3.3 \times 10^{-19} \mathrm{~J}\). Taking plank's constant to be \(6.6 \times 10^{-34} \mathrm{Js}\). Find threshold frequency.

\(\mathrm{C}_{\mathrm{s}}\) is the velocity of sound in air and \(\mathrm{C}\) is the R.M.S. velocity, then:

In a series resonant circuit, the AC voltage across resistance \(\mathrm{R}\), inductor \(\mathrm{L}\) and capacitor \(\mathrm{C}\), are \(5 \mathrm{~V}, 10 \mathrm{~V}\) and \(10 \mathrm{~V}\) respectively. The AC voltage applied to the circuit will be:

The mass number of nucleus having radius equal to half of the radius of nucleus with mass number 192 is:

Work of invertor is: