Class 12 - Physics मॉक टेस्ट

The intensity of electromagnetic wave is given by: (E₀ = electric field amplitude, c = speed of light, ε₀ = permittivity of free space)

In Young's double slit experiment, the fringe width is directly proportional to:

One mole of an ideal monoatomic gas undergoes a cyclic process ABCA as follows: AB is isobaric expansion from (V₀, P₀) to (2V₀, P₀), BC is isochoric cooling to (V₀, P₀/2), and CA is a straight line back to (V₀, P₀) on the P-V diagram. The net work done by the gas in the cycle is:

Light of wavelength 500 nm is incident on a metal surface with work function 2.0 eV. The maximum kinetic energy of emitted photoelectrons is: (h = 6.626 × 10⁻³⁴ J s, c = 3 × 10⁸ m/s, 1 eV = 1.6 × 10⁻¹⁹ J)

A wire of resistance 8 Ω is bent into a complete circle. The resistance between two diametrically opposite points is:

A proton and an alpha particle are accelerated through the same potential difference. The ratio of de Broglie wavelengths of proton to alpha particle is:

A straight conductor of length 0.5 m carrying a current of 2 A is placed perpendicular to a magnetic field of 0.4 T. The force on the conductor is:

Three point charges +q, +q and −2q are placed at the vertices of an equilateral triangle of side a. The magnitude of the net electric potential at the centroid of the triangle is: