CUET (UG) entrance exam Question Bank Solutions for Physics

The angular momentum of electron in n^th orbit is given by

The energy of an electron in h^th orbit of hydrogen atom is –13.6/n²ev energy required to excite the electron from the first orbit to the third orbit is

According to Bhor' s theory the moment of momentum of an electron revolving in second orbit of hydrogen atom will be.

A – pn junction has a depletion layer of thickness .of the order of

Depletion layer in p - n junction diode consists of

When we apply reverse biased to a junction diode, it

The nature of binding for a crystal with alternate and evenly spaced positive and negatively ions is

In forward bias width of potential barrier in a p + n junction diode

Use a transistor as an amplition

The expected energy of the electron at absolute zero is called:-

On increasing the reverse biases voltage to a large value in a P – N junction diode-current

Long distance short-wave radio broadcasting uses

Broadcasting antennas are generally

The sound produced by a funning fark is a sort of:-

What is meant by deviation in frequency of FM wave?

The audio frequency range is

The position-time relation of a particle moving along the x-axis is given by x = a - bt + ct² where a, band c are positive numbers. The velocity-time graph of the particle is ______.

A Carnot engine absorbs 1000 J of heat energy from a reservoir at 127°C and rejects 600 J of heat energy during each cycle. The efficiency of the engine and temperature of the sink will be:

A spring of spring constant 5 × 10³ N/m is stretched initially by 5 cm from the unstretched position. Then the work required to stretch it further by another 5 cm is:

When a current I is set up in a wire of radius r, the drift velocity is v_d· If the same current is set up through a wire of radius 2 r, the drift velocity will be: