CUET (UG) entrance exam Question Bank Solutions

The kinetic energy of electron in (electron volt) moving with the velocity of 4 × 10⁶ m/s will be

Find the de-Broglie Wavelength for an electron moving at the speed of 5.0 × 10⁶ m/s. (mass of electron is 9.1 × 10^-31)

Number of ejected photo electrons increase with increase

For what k.e of neutron will the associated de-Broglie wavelength be 1.40 × 10^-10 m? mass of neutron= 1.675 × 10^-27 kg, h = 6.63 × 10^-34 J

A strong argument for the particle mature of cathode ray is to

An oil drop carrying a charge q has a mass m kg it is falling freely in air with terminal speed v. the electron field required to make the drop move upward with the same speed is

The ground state energy of a hydrogen atom is - 13.6 eV When its electron is in the first excited state, its excitation energy is

Energy needed to establish an alternating current I in a coil of self-inductance L is

An inductor may store energy in

What is the unit of self-inductance of a coil?

A coil of wire of a certain radius has 600 turns and a self-inductance is 108 mH. The self-inductance of a second similar coil of 500 turns will be:

A family uses 8 kW of power. Direct solar energy is incident on the horizontal surface at an average rate of 200 W per square meter. If 20% of this energy can be converted to useful electrical energy, how large an area is needed to supply 8 kW?

If a heater coil rated lkW, 220 V is connected in series with an electric bulb of 100 W, 220 V and are supplied 200V, power consumed by the bulb in this circuit is ______.

The average work done by a human heart while it beats once is 0.5 Joule. The power used by heart if it beats 72 times in a minute:

A radioactive sample is undergoing α decay. At any time t₁, its activity is A and another time t₂, the activity is `"A"/5`. What is the average life time for the sample?

A electric bulb is rate 220 V, 60 W. its electric cell resistance is nearly

The net mass energy of an electron is

A deuteron is bombarded on 80¹⁶ nuclear and an x - = particle is emitted. The product nucleus is

In which of the following decays the atomic number decrease

The velocity of a body of mass 2 kg as a function of time t is given by v(t) = 2t`hat"i" + "t"^2hat"j"`. The force acting on it, at time t = 2 s is given by ______.