List of top Physics Questions asked in CUET (UG)

If the energy of incident radiation is increased by $25\%$, the kinetic energy of the photoelectrons emitted increases from 0.6 eV to 0.9 eV. The work function of the metal is:

In an LCR series circuit, the source of emf is E=30sin(100t), R=120Ω, L=100mH, C=100μF.
(A) The numerical value of impedance 
(B) The numerical value of resistance R 
(C) The numerical value of capacitive reactance 
(D) The numerical value of inductive reactance.
Arrange the values of quantities mentioned in (A, B, C, D) in increasing order.

If the momentum of an electron is changed by P, then the de Broglie wavelength associated with it changes by\( 1\%\). The initial momentum of the electron will be:

Consider the following particles:
(A) Proton,
(B) α-particle,
(C) Electron.
For charge to mass ratio of the above particles, we can say:

For the given diagram, E=ϕxN/C, the net flux through the cube of side x=1 cm, placed at x=1 cm from the origin is:

An equilateral prism is made of material of refractive index \(\sqrt{3}\). The angle of minimum deviation through the prism is:

For a light pipe as shown in the figure:

(A) Optical density of core should be greater than the optical density of cladding.
(B) r and θ will always be equal.
(C) Optical density of cladding is \(\frac{sinθ sin i}{sin r}\).
(D) Optical density of cladding is \(\frac{sin r sin i }{sin θ}.\)
Choose the correct answer from the options given below:

The study of radioactive decay results in the emission of particles, leading to four observations: (A) No change in atomic and mass number, (B) Atomic number decreases by 1, (C) Study of radioactive decay of unstable nuclei resulting in emission of a
particle leads us to four different observations listed below:
(A) Nochange in atomic number and mass number.
(B) Nochange in mass number but the atomic number decreases by 1.
(C) Nochange in mass number but the atomic number increases by 1.
(D) Atomic number decreases by 2 and the mass number decreases by 4.
Arrange the particles emitted in the above four cases in correct sequence:

In a p-type semiconductor, the acceptor level is situated 50 meV above the valence band. The maximum wavelength of light required to produce a hole will be:

A long solenoid is formed by winding insulated copper wire at the rate of 20 turns per cm. The current required to produce a magnetic field of 20 mT inside the solenoid at its center would be:

Two parallel plate capacitors, each of capacitance 40 µF, are connected in series. The space between the plates of one capacitor is filled with a material of dielectric constant K = 4. The equivalent capacitance of the system would be:

When a photon of energy hν falls on a photosensitive metallic surface (work function hν0), electrons are emitted from the metallic surface. It is possible to say that:

As per Nuclear Physics, there is a close relationship between mass num ber and radius of the nucleus. If the mass number of A is 216 and the mass number of B is 27, then the ratio of nuclear radius \(\frac{r_A}{r_B}\) of the two elements is:

Light from a point source in air falls on a spherical glass surface (n = 1.5, radius of curvature = 10cm). The distance of the light source from the glass surface is 50 cm. The position at which the image is formed is:

Read the following:
(A) The width of the central band in a diffraction pattern.
(B) The width of the first bright band in the diffraction pattern.
(C) The width of the central band in the diffraction pattern if D is doubled.
(D) The width of the first bright band in the diffraction pattern if D is tripled.
Choose the correct answer from the options given below in increasing order of width.

For a series LCR circuit, at the condition of resonance, the value of the power factor will be:

\( \text{ The electric field of an EM wave in free space is given by } E = 10 \cos(10^7 t + kx) \, \hat{j} \, \text{V/m, where } t \text{ and } x \text{ are in seconds and meters, respectively. It can be inferred that:}\)
Which of the following pairs of statements are correct:
(A) Wavelength λ is 188.4 m,
(B) Wave number k is 0.33 rad/m,
(C) Wave amplitude is 10 V/m,
(D) Wave is propagating along +x-direction.

\(\text{ Arrange the following in increasing order of focal length of convex lens:}\)
\((A)\) \(F_v\), focal lengths of violet
 \((B)\) \(F_r\), focal lengths of red
 \((C)\) \(F_b\), focal lengths of blue
\((D)\) \(F_y\), focal lengths of yellow
\(\text{Choose the correct answer from the options given below:}\)

A capacitor and a coil with resistance R are in series and connected to a 6 V AC source. By varying the frequency of the source, a maximum current of 600 mA is observed. If the same coil is now connected to a cell of emf 6 V and internal resistance of 2 ohms, the current through it will be:

Two identical coaxial coils P and Q carrying equal current in the same direction are brought nearer. The current in:

Match List-I with List-II.

List-I: Rule	List-II: Statement
(A) Ampere Swimming Rule	(I) Direction of induced current
(B) Fleming’s Left Hand Rule	(II) Direction of magnetic field lines due to current
(C) Fleming’s Right Hand Rule in straight conductor	(III) Direction of deflection of magnetic needle
(D) Right Hand Thumb Rule	(IV) Direction of force on a current-carrying conductor

Current through ABC and A′B′C′ is I as shown in the given figure. If PB=PB′=r and C′B′PBC are collinear, the magnetic field at P is:

Arrange the following materials in the increasing order of their resistivity: (A) Copper, (B) Platinum, (C) Silver, (D) Aluminium.