List of top Physics Questions asked in CUET (UG)

A circular wire loop of radius \(R\) is placed in the \(x\)-\(y\) plane centered at the origin. A square loop of side \(a\;(a\ll R)\) of single turn is placed with its plane parallel to the \(x\)-\(y\) plane and at a distance \(z=\sqrt{3}\,R\). The mutual inductance between the loops is
The velocity of an electromagnetic wave in a medium with \(\varepsilon_r=2\) and \(\mu_r=18\) is
Match List-I with List-II
where \[ \text{(I)}\;100\,\text{m} \] \[ \text{(II)}\;10^{-15}\,\text{m} \] \[ \text{(III)}\;10^{-10}\,\text{m} \] \[ \text{(IV)}\;10^{-3}\,\text{m} \] Choose the correct answer from the options given below:
The surface of a certain metal is first illuminated with light of wavelength \(\lambda_1=350\,\text{nm}\), and then by light of wavelength \(\lambda_2=540\,\text{nm}\). It is found that the maximum speed of the photoelectrons in the two cases differ by a factor of \(2\). The work function of the metal (in eV) is close to \[ \left(\text{Energy of photon}=\frac{1240}{\lambda(\text{nm})}\text{ eV}\right) \]
In a coil of resistance \(100\,\Omega\), a current is induced by changing the magnetic flux through it. The current versus time variation is as shown. The magnitude of change in flux through the coil is
In a full wave rectifier circuit operating with \(50\,\text{Hz}\) mains frequency, the fundamental frequency in the ripple at the output would be
Arrange the following steps in the chronological order, when a charged particle enters perpendicularly into a uniform magnetic field. (A) The charged particle starts moving in a circular path. (B) Net work done by the field is zero. (C) The speed of the charged particle remains constant but its direction changes. (D) A force acts perpendicular to both the velocity of the charged particle and the magnetic field. Choose the correct answer from the options given below:
Figures show four pairs of parallel plates \(P,Q,R\) and \(S\) with the same separation and the electric potential of each plate. The electric field between the plates is uniform and perpendicular to the plates. Arrange the plates in descending order of the magnitude of the electric field between the plates.
(A) P (B) Q (C) R (D) S Choose the correct answer from the options given below:
Match List-I with List-II
where \[ \text{(I)}\ [ML^2T^{-3}A^{-1}] \] \[ \text{(II)}\ [M^0L^2A] \] \[ \text{(III)}\ [ML^2T^{-2}A^{-1}] \] \[ \text{(IV)}\ [ML^2T^{-2}A^{-2}] \] Choose the correct answer from the options given below:
An electron is found to repel another electron at a distance of \(1\,\text{cm}\) with a force \(F=2.3\times10^{-24}\,\text{N}\). Two protons placed at a distance of \(5\,\text{cm}\) will
A magnetic dipole aligned parallel to a uniform magnetic field requires a work of \(W\) to rotate it through \(60^\circ\). The torque exerted by the field on the dipole in this new position is
Energy levels \(A\), \(B\), \(C\) of a certain atom correspond to increasing values of energy \((E_A<E_B<E_C)\). If \(\lambda_1\), \(\lambda_2\) and \(\lambda_3\) are the wavelengths of radiations corresponding to the transitions \(C\to B\), \(B\to A\) and \(C\to A\) respectively, the relation between these wavelengths can be written as
Five cells, each of emf \((E)\) and internal resistance \((r)\), are connected in series. If out of these five cells, one of the cells is connected with opposite polarity, the equivalent emf and internal resistance of the combination, respectively, will be
Nuclear forces are
Equipotential surfaces
Match List-I with List-II.
Choose the correct answer from the options given below:
Identify the correct statements with regard to the application of Gauss's law in electrostatics. (A) Gauss's law is true only for spherical closed surfaces. (B) The Gaussian surface should not pass through any discrete charges. (C) The total electric flux through any closed surface is zero, if no charge is enclosed by the surface. (D) The charge in the vicinity of the surface must be zero. Choose the correct answer from the options given below:
Two small insulating spheres are rubbed against each other and placed \(1\,\text{cm}\) apart. If they attract each other with a force \(F=0.1\,\text{N}\), the number of electrons that were transferred from one sphere to another during rubbing are nearly
In the given network, if \(V_A-V_C=8\,\text{V}\), the value of \(R\) is
A parallel plate capacitor is formed by two plates each of area \(30\pi\,\text{cm}^2\) separated by \(1\,\text{mm}\). A material of dielectric strength \(3.6\times10^7\,\text{V m}^{-1}\) is filled between the plates. If the maximum charge that can be stored in the capacitor without causing any dielectric breakdown is \(7\times10^{-6}\,\text{C}\), the value of dielectric constant of the material is
An electron beam has an aperture \(2\,\text{mm}^2\). A total of \(6.0\times10^{15}\) electrons pass through any perpendicular cross-sectional area per second. The current density of the beam is
When a forward bias is applied to a p-n junction diode, then (A) majority carrier current becomes zero. (B) potential barrier is raised. (C) width of the depletion layer reduces. (D) junction resistance increases. Choose the correct answer from the options given below:
The circuit has two oppositely connected ideal diodes in parallel. The current flowing in the circuit will be
For a cell or a battery, the emf is (A) equal to the potential difference between its terminals when terminals are not connected externally (B) less than the potential difference between its terminals when the cell/battery is being discharged (C) always greater than the potential difference between its terminals (D) less than the potential difference between its terminals when the cell/battery is being charged Choose the correct answer from the options given below:
The oscillating electric and magnetic field vectors of an electromagnetic wave are in