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Two harmonic waves moving in the same direction superimpose to form a wave x = a cos (1.5t) cos (50.5t) where t is in seconds. Find the period with which they beat. (close to nearest integer)

1. 1 s
2. 6 s
3. 4 s
4. 2 s CAREER POINT CAREER POINT Ltd., CP Tower, IPIA, Road No.1, Kota (Raj.), Ph: 081 ‐ 47250011 www.careerpoint.ac.in 12 JEE Main Online Paper

Correct answer: 2 s CAREER POINT CAREER POINT Ltd., CP Tower, IPIA, Road No.1, Kota (Raj.), Ph: 081 ‐ 47250011 www.careerpoint.ac.in 12 JEE Main Online Paper

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