Physics-
General
Easy
Question
Light with energy flux
is incident on a circular part of radius 1.4 m of a perfectly black body. The force experienced by the body and the momentum delivered in 10 minutes are
The correct answer is: ![0.74 mu N semicolon 444 mu k g m s to the power of negative 1 end exponent](data:image/png;base64,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)
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In an apparatus, the electric field was found to oscillate with amplitude of 18 V/m. The amplitude of the oscillating magnetic field will be
In an apparatus, the electric field was found to oscillate with amplitude of 18 V/m. The amplitude of the oscillating magnetic field will be
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In a plane electromagnetic wave, the electric field oscillates sinusoidally at a frequency of
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The velocity of an electromagnetic wave in a medium is
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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)
The velocity of an electromagnetic wave in a medium is
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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The diameter of the condenser plate is 4cm. It is charged by an external current of 0.2A. The maximum magnetic field induced in the ga
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