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JEE PHYSICS MCQ: ELECTROMAGNETIC WAVES
1
Medium
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Understanding
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Assertion: During discharging there is magneticfield between plates of capacitor.
Reason : Time varying electric field produces magnetic field.
Reason : Time varying electric field produces magnetic field.
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Correct option: A
If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion
Option A is correct because a time-varying electric field between the capacitor plates during discharging produces a magnetic field, as described by Maxwell's equations.
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Reason: The rest mass of photon is zero Intensity of electromagnetic wave will be The rms value of the electric field of the light coming from the Sun is . The average total energy density of the electromagnetic wave is Methane is a greenhouse gas because
Statement II: Sound waves require a material medium for propagation. For a plane electromagnetic wave propagating in x-direction, which one of the following combination gives the correct possible directions for electric field and magnetic field respectively? Assertion: The relative velocity of two photons travelling in opposite directions is the velocity of light.
Reason: The rest mass of photon is zero Intensity of electromagnetic wave will be The rms value of the electric field of the light coming from the Sun is . The average total energy density of the electromagnetic wave is Methane is a greenhouse gas because