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JEE PHYSICS MCQ: ELECTROMAGNETIC WAVES
1
Medium
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Application
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A parallel capacitor made of circular plates of radius has a capacitance of . The capacitor is connected to a 200 a.c. supply with an angular frequency of .
(i) What is the r.m.s. value of conduction current?
(ii) Is the conduction current equal to displacement current?
(i) What is the r.m.s. value of conduction current?
(ii) Is the conduction current equal to displacement current?
View answer and explanation
Correct option: A
; Yes
Option A (; Yes) is correct because the conduction current is equal to the displacement current in a capacitor, and its value is calculated using the given parameters.
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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
