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Electromagnetic Waves Quiz-1

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Difficulty Level :
10 Question

Popular Questions In Electromagnetic Waves Quiz-1

  • Electromagnetic waves are produced by

  • An electromagnetic wave, propagating along the x-axis, can be represented by the equations:

  • From the following, the only incorrect statement, about EM waves, is the statement:

  • The equation E=E0sin(kxωt)E=E_0\sin(kx-\omega t) could represent the oscillations of the electric field of a microwave if k and ω\omega have the values

  • The SI unit of the poynting vector (S) defined by the formula: S=1μ0(E×B)S=\frac{1}{\mu_0}(E\times B) is

  • An electromagnetic wave of frequency v = 3 MHz passes from Vaccum into a dielectric medium with permittivity ϵ=4.\epsilon=4. Then wavelength will be

  • A monochromatic source of power 0.66 kW, and efficiency 100%, emits 102010^{20} photons is one second. These photons belong to the region of

  • A point source of electromagnetic radiation has an average power output of 135 W. The maximum value of electric field, at a distance of 3 m from the source, (in Vm1Vm ^{-1}) is

  • The range of wavelengths allotted for commercial FM radio is

  • Monochromatic source, of power 4 kW and 100% efficiency produces 102010^{20} photons every second. The radiations emitted by it belong to the part of the EM spectrum called: