List of top Physics Questions asked in CUET (UG)

Two cells \(\varepsilon_1\) and \(\varepsilon_2\) are connected in opposition to each other as shown in the figure. The cell \(\varepsilon_1\) is of emf \(9\ \text{V}\) and internal resistance \(3\ \Omega\). The cell \(\varepsilon_2\) is of emf \(7\ \text{V}\) and internal resistance \(7\ \Omega\). The potential difference between the points \(A\) and \(B\) is:

A battery of emf \(15\ \text{V}\) and internal resistance of \(4\ \Omega\) is connected to a resistor. If the current in the circuit is \(2\ \text{A}\), the resistance of the resistor and terminal voltage of the battery will be:

Choose the correct combination of three resistances \(1\ \Omega\), \(2\ \Omega\) and \(3\ \Omega\) to get equivalent resistance \(\dfrac{11}{5}\ \Omega\).

A wire has a resistance of \(2.5\ \Omega\) at \(28^\circ C\) and a resistance of \(2.9\ \Omega\) at \(100^\circ C\). The temperature coefficient of resistivity of the material of the wire is:

A slab of material of dielectric constant \(K\) has the same area \(A\) as the plates of a parallel plate capacitor, and has thickness \(\left(\frac{3}{4}d\right)\), where \(d\) is the separation of the plates. The capacitance when the slab is inserted between the plates is:

A parallel plate capacitor of capacitance \(5\ \mu F\) and plate separation \(6\ \text{cm}\) is connected to a \(1\ \text{V}\) battery and charged. A dielectric of dielectric constant \(4\) and thickness \(4\ \text{cm}\) is introduced between the plates of the capacitor. The additional charge that flows into the capacitor from the battery is:

A parallel plate capacitor having area \(A\) and separated by distance \(d\) is filled by a copper plate of thickness \(b\). The new capacity is:

An electric dipole of moment \(\vec{p}\) is placed in a uniform electric field \(\vec{E}\). Then

• [(i)] the torque on the dipole is \(\vec{p}\times\vec{E}\).
• [(ii)] the potential energy of the system is \(\vec{p}\cdot\vec{E}\).
• [(iii)] the resultant force on the dipole is zero.

Choose the correct option.

Two parallel infinite line charges \(+\lambda\) and \(-\lambda\) are placed with a separation distance \(R\) in free space. The net electric field exactly mid-way between the two charges is:

A circular plane sheet of radius \(10\ \text{cm}\) is placed in a uniform electric field of \(5 \times 10^5\ \text{N C}^{-1}\), making an angle of \(60^\circ\) with the field. The electric flux through the sheet is:

A convex lens is made from glass material having refractive index of \(1.4\) with same radius of curvature on both sides. The ratio of its focal length and radius of curvature is ________.

A magnetic field vector in an electromagnetic wave is represented by \[ \vec{B} = B_0 \sin\left(2\pi \nu t - \frac{2\pi x}{\lambda}\right)\hat{j} \] Its associated electric field vector is ________.

A solenoid has a core made of material with relative permeability \(400\). The magnetic field produced in the interior of solenoid is \(1.0\,\text{T}\). The magnetic intensity in SI units is \(\alpha \times 10^5\). The value of \(\alpha\) is ________. \[ \text{Given: } \mu_0 = 4\pi \times 10^{-7}\,\text{SI units} \]

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R. Assertion A: In electrostatics, a conductor does not store any net charge inside. Reason R: Inside the capacitor (with no dielectric medium), the free charge carriers, if placed between the plates of capacitor, experience force and drift. Choose the correct answer from the options given below:

The binding energy per nucleon of \(^{209}_{83}\mathrm{Bi}\) is ________ MeV. \[ \text{Given: } m\left(^{209}_{83}\mathrm{Bi}\right)=208.980388\,u, \quad m_p=1.007825\,u, \quad m_n=1.008665\,u, \] \[ 1u = 931\,\text{MeV}/c^2 \]

A circular current loop of radius \(R\) is placed inside a square loop of side length \(L\) \((L \gg R)\) such that they are co-planar and their centers coincide. The permeability of free space is \(\mu_0\). The mutual inductance between circular loop and square loop is ________.

Two point charges \(8\,\mu C\) and \(-2\,\mu C\) are located at \(x = 2\,\text{cm}\) and \(x = 4\,\text{cm}\), respectively on the \(x\)-axis. The ratio of electric flux due to these charges through two spheres of radii \(3\,\text{cm}\) and \(5\,\text{cm}\) with their centers at the origin is ________.

Two resistors of \(200\,\Omega\) and \(400\,\Omega\) are connected in series with a battery of \(100\,\text{V}\). A bulb rated at \(200\,\text{V}, 100\,\text{W}\) is connected across the \(400\,\Omega\) resistance. The potential drop across the bulb is _________ V.

An electromagnetic wave travels in free space along the \(x\)-direction. At a particular point in space and time, \[ \vec{B} = 2 \times 10^{-7}\,\hat{j}\,\text{T} \] is associated with this wave. The value of corresponding electric field \(\vec{E}\) at this point is __________ V/m.

In an LCR circuit at resonance:

Light of wavelength \(400\ \text{nm}\) falls on a metal surface. The energy of one photon is approximately: \[ \left( h=6.63\times10^{-34}\ \text{J s},\quad c=3\times10^8\ \text{m/s} \right) \]

In photoelectric effect, the stopping potential depends upon:

Electromagnetic waves are:

The ratio of electric field amplitudes and magnetic field amplitudes in an electromagnetic wave in vacuum is equal to: