CBSE 12 Physics Question Paper-2023 Set-5

An electric dipole of length 2 cm is placed at an angle of 30° to an electric field of 2 × 10⁵ N/C. If this dipole experiences a torque of 8 × 10⁻³ Nm, then the magnitude of the charge on either of the dipole is:

Two long parallel wires, each carrying a current of 3A in the same direction, are kept at a distance of 2 m from each other. The force per unit length on one wire due to the other is:

The permeability of which of the following is less than the permeability of free space?

A square coil of side 10 cm and having 100 turns is placed perpendicular to a magnetic field which is increasing at the rate of 1 T/s. The induced emf in the coil is:

Which of the following electromagnetic radiations has the shortest wavelength?

In a Young's double-slit experiment, the screen is moved away from the plane of the slits. What will be its effect on the following? (i) Angular separation of fringes, (ii) Fringe width

Choose the correct option for the wavelengths (λ) corresponding to different parts of the electromagnetic spectrum:

Regarding the photoelectric effect, due to which characteristic of light can the number of emitted electrons be increased?

The energy of a photon is E. If its momentum is p and velocity is c, then

Which of the following graphs correctly represents the variation of the focal length (f) of a lens with the wavelength (λ) of light?

In an n-type semiconductor, the majority charge carriers are:

In an experiment of the photoelectric effect, if the intensity of the incident light is doubled, the stopping potential:

The energy of a photon is E. If its momentum is p and velocity is c, then

The energy transition for the shortest wavelength in the Lyman series of the hydrogen atom is:

For a plane wave, the locus of points vibrating in the same phase is called:

Regarding the photoelectric effect, on what does the maximum kinetic energy of the emitted electrons depend?

What is modulation?

In amplitude modulation (AM), which parameter changes?