List of practice Questions

The nucleus which is an isotope of C1₁₇ and also an isobar of Ar₁₈ has mass number A and atomic number Z given by ______

The time interval between two event in a reference frame which is in motion is

Which source is accociated with line emission spectrum?

A wire is cut into 4 pieces, which are put together side by side to obtain one conductor. If the original resistance of the wire was R, the resistance of the bundle will be

In a superconductor, critical magnetic field

In ruby laser, some of aluminium ions are (Al³⁺)replaced by

Light of wavelength 5500 Å from narrow slit is incident on a double slit. The overall separation of 5 fringes on a screen 200 cm away is 1 cm. Calculate slit seperation.

The core used in a transformer is laminated in order to

The line joining the pole of the mirrors and its centre of curvature is called _____

A given mass of a gas is at pressure P and absolute temperature T. The isothermal bulk modulus of the gas is

A spherical black body of radius 12cm radiates 450W power at 500K. If the radius is one half and the temperature doubled, the power radiated in watt will be

___ is defined as the angle of incidence in the denser medium for which the corresponding angle of refraction in the rarer medium is 90^o

The velocity of light in vacuum is ________

Which of the following is adiabatic gas equation?

Equal masses of two substances of densities ρ ₁ and ρ₂ are mixed together. The density of the mixture would be

For aluminium the bulk modulus of elasticity is 7.5 x1010 N/m2 and density is 2.7 x103 kg/m2 . The velocity of longitudinal waves is aluminium is

If the temperature of a liquid is raised, then its surface tension is _____

The end correction for the vibrations of air column in a tube of circular cross-section will be more if the tube is,

Two forces of magnitude 5 N and 10 N act on a wooden block of mass 2 kg. If 5 N force acts towards right and 10 N force acts towards left, which one of following statements is correct?

A Circular disc is rotating with angular velocity ω . A man standing at the edge walks towards the centre of the disc then the angular velocity ω.

For ordinary terrestial experiments, the observer in an inertial frame in the following cases is