CUET (UG) entrance exam Question Bank Solutions for Physics

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:

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