Electromagnetic Waves

A parallel-plate capacitor of $50\ \mu\text{F}$ contains a dielectric slab of constant ($k$) with the same dimensions. If a time-varying potential difference is applied at a rate of $50\ \text{V/s}$. What is the…

The magnetic field in a travelling electromagnetic wave has a peak value of $20 \mathrm{nT}$. The peak value of electric field strength is

Column - I lists the waves of the electromagnetic spectrum. Column - II gives approximate frequency range of these waves. Match Column - I and Column - II and choose the correct match from the given choices. No.Column…

Match List - I with List - II: List - I (Electromagnetic waves) List - II (Wavelength) (a) AM radio waves (i) $10^{-10}m$ (b) Microwaves (ii) $10^{2}m$ (c) Infrared radiations (iii) $10^{-2}m$ (d) X-rays (iv) $10^{-4}m$…

The following table presents the part of the electromagnetic spectrum and their corresponding major applications. Part of the electromagnetic spectrumApplicationsP. MicrowaveI. For purifying the waterQ. UV raysII. For…

Match List I with List II : List I (Electromagnetic wave)List II (Production)A. MicrowaveI. Electrons in atoms emit light when they move from a higher energy level to a lower energy levelB. Visible lightII. Radioactive…

The wavelength of an X-ray beam is $10\AA\,$. The mass of a fictitious particle having the sameenergy as that of the X-ray photons is $\frac{x}{3}h\mathrm{kg}.$ The value of $x$ is ___ .($h=$Planck's constant)

The energy density associated with electric field$\vec{E}$and magnetic field$\vec{B}$of an electromagnetic wave in free space is given by ($\epsilon\,_{0}-$permittivity of free space, $\mu\,_{0}-$permeability of free…

Match List I (Wavelength range of electromagnetic spectrum) with List II(Method of production of these waves) and select the correct option from the options given below the lists. List I List II (a) $700\mathrm{nm}$ to…

Match List - I with List - II. List-I List-II (a) Source of microwave frequency (i) Radioactive decay of nucleus (b) Source of infrared frequency (ii) Magnetron (c) Source of Gamma Rays (iii) Inner shell electrons (d)…

A parallel plate capacitor consists of two circular plates each of radius \(2 $\mathrm{~cm}\),$ separated by a distance of \(0.1 $\mathrm{~mm}\).$ If the potential difference across the plates is varying at the rate of…

The correct ascending order of the wavelengths of the following electromagnetic waves is Ultraviolet, X-rays, infrared, gamma rays and visible light?