CBSE 12 Physics Question Paper-2024 Set-4

Consider a group of charges q₁, q₂, q₃ such that Σq≠0. Then equipotentials at a large distance, due to this group are approximately:

A proton is taken from point P₁ to point P₂ both located in an electric field. The potentials at points P₁ and P₂ are -5 V and +5 V respectively. Assuming that kinetic energies of the proton at points P₁ and P₂ are zero, the work done on the proton is:

Two concentric circular coils X and Y of radii R and r respectively, placed in the same plane. The coil Y is a galvanometer and a current I is flowing through the coil X. If the current in X is reversed, what is the induced charge flowing through the coil Y?

Consider a solenoid of length l, area of cross-section A and number of turns is fixed. The self-inductance of the solenoid will increase if:

Two thin long parallel wires separated by a distance 'a' carry current 'I' in opposite directions. The wires will:

The average value of the alternating voltage v = (157 V) sin ωt over its first half-cycle is:

Which of the following has the highest frequency?

A proton and an alpha particle having equal velocities approach a target nucleus. They come momentarily to rest and then reverse their directions. The ratio of the distance of closest approach of the proton to that of the alpha particle will be:

A ray of light is incident on a prism of refracting angle 60° and refractive index 1.5 at an angle of 30° to the normal. The angle of deviation will be:

In a Young's double slit experiment, the distance between the slits is 0.5 mm and the screen is 2.0 m from the slits. If the wavelength of light used is 500 nm, the distance of the third bright fringe from the central bright fringe is:

The peak voltage of an AC supply is 300 V. The rms voltage will be:

The electric potential at a point on the equatorial plane of an electric dipole is:

An inductor of inductance 50 mH is connected to a resistor of resistance 10 Ω in series with a 5 V battery. The time constant of the circuit is:

If a coil of copper wire is immersed in a magnetic field, the induced emf produced in the coil is:

A rectangular wire loop of sides 8 cm and 2 cm with a small cut is moving out of a region of a uniform magnetic field of magnitude 0.3 T directed normal to the loop. The velocity of the loop is 1 cm s⁻¹ in the direction normal to the longer side. The emf developed across the cut is:

A proton and a deuteron, having the same momentum, enter a uniform magnetic field at right angles to the field. The ratio of the radii of their paths is:

An alternating emf is given by E = 140 sin(500t) V. If this is connected to a resistor of resistance 50 Ω, the rms current is:

A prism of a refracting angle 60° gives an angle of minimum deviation of 30°. The refractive index of the prism is:

A plane convex lens of focal length 20 cm is silvered at the plane surface. The focal length of the resulting mirror is:

If the electric flux coming out of a closed surface is zero, it signifies that:

A ray of light incident normally on a plane mirror, will:

A student connected a voltmeter, an ammeter and a resistor in series with a 10 V battery. The reading of the ammeter was 2 A. What would be the reading of the voltmeter if the voltmeter has a very high resistance?

The photoelectric effect demonstrates the:

In a series L-C-R circuit, the voltage across the resistance and inductance is 10 V and 20 V respectively. The voltage across the capacitance is also 20 V. The resonant frequency of the circuit is 100 Hz. The value of the resistance is:

The electric field in an electromagnetic wave in vacuum is given by: E = (20 V/m) sin(3 x 10⁶ rad/m x - 2 x 10¹⁵ rad/s t). The wavelength of the wave is: