AIPMT Mains Physics Electromagnetic Waves Class 12 Questions

The ratio of amplitude of magnetic field to the amplitude of electric field for an electromagnetic wave propagating in vacuum is equal to:

Charge q is uniformly spread on a thin ring of radius R. The ring rotates about its axis with a uniform frequency f Hz. The magnitude of magnetic induction at the center of the ring is :

A square loop, carrying a steady current I, is placed in a horizontal plane near a long straight conductor carrying a steady current I₁ at a distance d from the conductor as shown in figure. The loop will experience

The electric field of an electromagnetic wave in free space is given by $\mathbf{E} = 10 \cos(10^7 t + kx) \hat{j}$ V/m, where $t$ and $x$ are in seconds and metres respectively. It can be inferred that

A particle having a mass of 10⁻² kg carries a charge of 5 × 10⁻⁸ C. The particle is given an initial horizontal velocity of 10⁵ ms⁻¹ in the presence of electric field E̅ and magnetic field B̅. To keep the particle moving in a horizontal direction, it is necessary that

Two identical bar magnets are fixed with their centres at a distance d apart. A stationary charge Q is placed at P in between the gap of the two magnets at a distance D from the centre O as shown in the figure. The force on the charge Q is

A conducting circular loop is placed in a uniform magnetic field 0.04 T with its plane perpendicular to the magnetic field. The radius of the loop starts shrinking at 2 mm/s. The induced emf in the loop when the radius is 2 cm is:

The electric field part of an electromagnetic wave in a medium is represented by Eₓ = 0; Eᵧ = 2.5 N/C cos [(2π × 10⁶ rad/m) x - (π × 10⁻² rad/s) t]. The wave is:

The velocity of electromagnetic radiation in a medium of permittivity ε₀ and permeability μ₀ is given by

A long solenoid has 500 turns. When a current of 2 ampere is passed through it, the resulting magnetic flux linked with each turn of the solenoid is 4 × 10⁻³ Wb. The self-inductance of the solenoid is