CUET (UG) entrance exam Question Bank Solutions for Physics

The working of a dynamo is based on the principle of

Displacement current goes through the gap between the plantes of a capacitors. When the charge of the capacitor:-

Cathode rays can be deflected by

In photoelectric effect, the photoelectric current

Plutonium decays with half of 24000 years. If plutonium is store for 72000 yrs. The fraction of .its that remain:-

The radius of electron's second stationary orbit in Bohr's atom is R. The radius of 3^rd orbit will be:-

The ratio of the frequencies of the long wave length its of Lyman Balmer series of hydrogen spectrum is

Which of the following transition in a hydrogen atom emit photon of the highest frequency:

The ratio active Nude 7N¹³ decays 6C¹³ through the emission of

An alpha particle has

In 88 Ra²²⁶ nucleus, there are

Nucleolus of an atom of mass No. 24 and charge no. 11 consists of

The ratio of minimum to max^m wavelength in ballmer series is:-

A hole in a. p – type semiconductor is

An n-type semiconductor is

For germanium crystal, the forbidden gas energy gap

A semiconductor is cooled from T.K to T₂K its resistance will

In a common-base circuit calculate the change in the base current if that in the emitter current is αmA and a = 0.98

In a semiconductor, the forbidden energy gap between the valence, band and the conduction band is of the order of

The valance of an impurity added to germanium crystal in order to convert it into p-type semiconductor is