Questions and Answers
What is the displacement current in a capacitor?
Current due to the changing electric field
What is the relationship between the conduction current and the displacement current in a circuit?
Their sum is always continuous
What is the direction of the electric vector in an electromagnetic wave?
Perpendicular to the direction of propagation
What is Faraday's law of electromagnetic induction?
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Who was the first to predict the existence of electromagnetic waves?
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What is the intensity of the electromagnetic wave given in the problem?
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What is the maximum value of electric field at a distance 3.5 m from the source?
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What is the value of magnetic field at a distance 3.5 m from the source?
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What is the displacement current through the capacitor?
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What is the value of magnetic field between the plates of the capacitor, at a distance of 1m from the centre?
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What is the primary mechanism by which X-rays are produced?
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What is the characteristic of electromagnetic waves that allows them to propagate without a material medium?
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What is the relationship between the energy density of the electric field and the magnetic field in an electromagnetic wave?
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What is the speed of electromagnetic waves in free space?
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What is the intensity of an electromagnetic wave equal to?
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What is the unit of the Poynting vector S?
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If an electromagnetic wave of energy u is totally reflected from a surface, what is the momentum delivered to the surface?
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What is the intensity of an electromagnetic wave equal to?
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What is the radiation pressure on a perfectly absorbing surface?
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What is the energy density of an electromagnetic wave equal to?
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What is the total population covered by the TV telecast if the average population density around the tower is 1000 / Km 2?
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If the energy of an electromagnetic radiation is 14.4 KeV, what is the corresponding wavelength?
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What is the unit of radiation pressure?
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If the intensity of an electromagnetic wave is 800 W/m 2, what is the corresponding Poynting vector?
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What is the momentum of an electromagnetic wave per unit area per unit time?
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What is the ratio of the energy density of the magnetic field to the energy density of the electric field in an electromagnetic wave?
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What is the direction of the Poynting vector in an electromagnetic wave?
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What is the physical significance of the intensity of an electromagnetic wave?
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What is the relationship between the radiation pressure of an electromagnetic wave and its intensity?
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What is the momentum of an electromagnetic wave?
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