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The ratio of contributions made by the electric field and magnetic field components to the intensity of an electromagnetic wave is:
( speed of electromagnetic waves)
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Important Questions on Electromagnetic Waves
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Which colour of the light has the longest wavelength?
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A parallel plate capacitor of capacitance is being charged by a voltage source whose potential is changing at the rate of . The conduction current through the connecting wires, and the displacement current through the plates of the capacitor would be, respectively:
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An EM wave is propagating in a medium with a velocity . The instantaneous oscillating electric field of this em wave is along axis. Then the direction of oscillating magnetic field of the EM wave will be along
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In an electromagnetic wave in free space the root mean square value of the electric field is . The peak value of the magnetic field is
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A resistance and a capacitor of reactance are connected in series across a source. When the capacitor is charged, the peak value of the displacement current is
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Out of the following options which one can be used to produce a propagating electromagnetic wave?
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A radiation of energy falls normally on a perfectly reflecting surface. The momentum transferred to the surface is ( = Velocity of light)
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The energy of the em waves is of the order of . To which part of the spectrum does it belong?
