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Earn 100

In free space, the ratio of magnitude of electric field to that of magnetic field of a plane electromagnetic wave is .

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Important Questions on Electromagnetic Waves

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A capacitor of capacitance C, is being charged up by connecting it across a d.c. voltage source of voltage V. How do the conduction and displacement currents, in this set up compare with each other
(i) During the charging up process?
(ii) After the capacitor gets fully charged?
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The velocity of propagation (in vacuum) and the frequency of (i) x-rays and (ii) radio waves are denoted by, vx, fx and vR, fR respectively. How are these values related to each other?
(i) vx and vR
(ii) fx and fR
Compare with each other.
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Let the wavelengths of electromagnetic waves used quite often for
(i) Killing germs in household water purifiers.
(ii) Remote sensing.
(iii) Treatment of cancer.
be labelled as λ1,λ2 and λ3. Arrange λ1,λ2 and λ3 in increasing order.
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Name the part of the electromagnetic spectrum of wavelength 10-2m and mention its one application.
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If you find closed loop of B in a region in space, does it necessarily mean that actual charges are flowing across the area bounded by the loops?
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Give difference between displacement current and conduction current.
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Is displacement current, like conduction current, a source of magnetic field?