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JEE Main - Previous Year Papers JEE MAIN 2021 PAPER -2 Single Correct MCQ

Published on: August 12, 2026

Match List - I with List - II.
List – I List - II

Source of microwave frequency (i) Radioactive decay of nucleus
-(ii), -(vi), -(ii), -(vi),

Source of infrared frequency (ii) Magnetron
-(iv), -(iv), -(iv), -(v),

Source of Gamma Rays (iii) Inner shell electrons
-(i), -(i), -(vi), -(i),

Source of X-rays (iv) Vibration of atoms and molecules (v) LASER
(vi) RC circuit Choose the correct answer from the options given below: -(iii)
-(v)
-(iii)
-(iv)

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The correct answer is:

Source of microwave frequency - (ii) Magnetron

Source of infra-red frequency - (iv) Vibration of atom and molecules

Source of gamma ray - (i) Radioactive decay of nucleus

Source of X-ray - (iii) inner shell electron

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