Physics-
General
Easy
Question
In an electromagnetic wave in vacuum The electrical and magnetic fields are 40pV/m and
The Poynting vector
The correct answer is: ![4.0 W m to the power of negative 1 end exponent](data:image/png;base64,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)
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If the relative permeability is 1 the relative permittivity of the medium is ![open parentheses C subscript 0 end subscript equals 3 cross times 10 to the power of 8 end exponent m S to the power of negative 1 end exponent close parentheses](data:image/png;base64,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)
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A condenser of capacity 50 p F is connected to an AC supply of 220 V 50 Hz. The rms value of magnetic field at a distance of 5cm from the axis is
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