CUET (UG) entrance exam Question Bank Solutions for Physics

At room temperature, copper has free electron density of 8.4 × 10²⁸ per m³. The copper conductor has a cross-section of l0⁻⁶ m² and carries a current of 5.4 A. The electron drift velocity in copper is:

A point object is placed at a distance of 20 cm from a thin plano-convex lens of focal length 15 cm, if the plane surface is silvered. The image will form at:

Coulomb's law is given by F = k q₁q₂ rⁿ where n is 

Two charge – 10c and + 10 c are placed 10 cm apart. Potential at centre of the line joining the two charge is:-

The capacity of an isolate conducting sphere of radius R is proportional to

The S.I unit of electric permittivity is

Metals are good conductor of heat than insulator because

Amount of charge in coulomb required to deposit one gram equivalent of substance by electrolysis is:-

An electric bulb.is rated 220 v and 100 watt power consumed by it when operated on 'no volt is:-

The Ionisation energy of hydrogen atom is 3.6 ev The ionisation energy of helium atom would be

The distance between consecutive maxima and minima is given by

Balun is a transformer which changes

The power of two-wire transmission line travels:-

The velocity of e.m wave in a dielectric medium (Er = 4) is

The characteristic impedance of a loss transmission line is

The characteristic impedance of a loss less transmission line is given by.

Lenz’s law is a consequence of the law of conservation of ______.

A police van moving on a highway with a speed of 30 km/h fires a bullet at a thief's car speeding away in the same direction with a speed of 192 km/h. If the muzzle speed of the bullet is 150 m is, with what speed does the bullet hit the thief's car?

2 A 40 kg boy whose legs are 4 cm in area and 50 cm long falls through a height of 2 m without breaking his leg bones. If the bones can withstand stress of 0.9 x 10⁸ N/m². The Young's modulus for the material of the bone is ______.

Pressure P varies as P = `alpha/beta "exp" (- (alpha x)/"k"_"BT")`, where x denotes the distance, kB is the Boltzmann's constant, T is the absolute temperature and α and β are constant. The dimension of β is ______.