Physics Test - ...

A ray of light suffers minimum deviation while passing through a prism of refractive index \(1.5\) and refracting angle \(60^{\circ}\). Calculate the angle of deviation and angle of incidence? (Given: \(\sin^{-1} 0.75=48^{\circ}\) )

A tuning fork of frequency \(256\) Hz makes \(32\) vibrations. Find the distance travelled by the sound in air. (\(V_{air}\)\(= 320\) m/s)

How the temperature of a thermodynamic system can be increased without giving heat energy to the system?

If the tension in the cable supporting a lift moving downwards is half the tension when it is moving upwards, the acceleration of the lift is:

A black body is at a temperature of \(2880 \mathrm{~K}\). The energy of radiation emitted by this object with wavelength between \(499 \mathrm{~nm}\) and \(500 \mathrm{~nm}\) is \(\mathrm{U}_{1}\), between \(999 \mathrm{~nm}\) and \(1000 \mathrm{~nm}\) is \(\mathrm{U}_{2}\) and between \(1499 \mathrm{~nm}\) and \(1500 \mathrm{~nm}\) is \(\mathrm{U}_{3} .\) Wien's constant \(\mathrm{b}=\) \(2.88 \times 10^{6} \mathrm{~nm}-\mathrm{K}\), then:

Find the amount of work done in rotating a dipole of dipole moment \(3 \times 10^{-3} cm\) from its position of stable equilibrium to the position of unstable equilibrium, in a uniform electric field of intensity \(10^{4} NC C ^{-1}\).

Find the value of \(D\) if the wavelength of the wave is \(40~ m , n =2~ m\) and the angles are given as \(\theta _1=0^{\circ}, \theta_ 2=180^{\circ}\).

Match items in Group 1 with item in Group 2, most suitable.

A copper sphere of mass \(2 g\) contains nearly \(2 \times 10^{22}\) atoms. The charge on the nucleus of each atom is \(29 e\). What fraction of the electrons must be removed from the sphere to give it a charge of \(+2 \mu C\)?

An object with a mass of 22 kg moving with a velocity of 5 m/s possesses kinetic energy of: