Class 12 Physics Chapter 8: Electromagnetic Waves Assertion-reason questions with answers
2 assertion-reason questions on Electromagnetic Waves, each with its answer and the reason, written from the NCERT chapter. For the CBSE board, JEE Main and NEET, which are set from the same NCERT chapter. Open a question's solution to check your working; then take the free test to find your next chapter. Each question gives an Assertion (A) and a Reason (R); choose how they stand to each other.
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Answer: (a) Both A and R are true, and R is the correct explanation of A.
Both are true. It is a result of Maxwell's theory that accelerated charges radiate; an electron with constant velocity has no acceleration, and a charge in uniform motion gives only a magnetic field that does not vary, so it is not a source of waves. R is the reason for A.
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Answer: (b) Both A and R are true, but R is not the correct explanation of A.
Both are true statements from the chapter. A rests on ultraviolet's ability to destroy germs; the absorption of ultraviolet by glass is a separate property and does not explain A.
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