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JEE PHYSICS MCQ: ELECTROMAGNETIC WAVES
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Application
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A charged particle enters a uniform magnetic field with a velocity vector at an angle of with the magnetic field. The pitch of the helical path followed by the particle is p. The radius of the helix will be
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Correct option: C
Option C () is correct because it correctly relates the radius of the helix to the pitch using the given angle and the formulas for pitch and radius in a magnetic field.
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Statement I: Sound waves are not electromagnetic waves.
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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
