CUET (UG) entrance exam Question Bank Solutions for Physics

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 ______.

Young's modulus for aluminium is 7 × 10¹⁰ Pa. The force needed to stretch an aluminium wire of diameter 2 mm and length 800 mm by 1 mm is ______.

A p-n photodiode is fabricated from a semiconductor with a band gap of 2.5 eV. lt can detect a signal of wavelength ______.

X-rays, gamma rays and microwaves travelling in a vacuum have ______.

A bat moving at 10 ms⁻¹ towards a wall sends a sound signal of 8000 Hz towards it. On reflection, it hears a sound of frequency f The value of f in Hz is close to (speed of sound = 320 ms⁻¹)

For LED's to emit light in visible region of electromagnetic light, it should have energy band gap in the range of: