NEET Waves MCQs & PYQs

Practice NEET Waves Questions

Question 61:

easy

Wave has simple harmonic motion whose period is 4 seconds while another wave which also possesses simple harmonic motion has its period 3 sec. If both are combined, then the resultant wave will have the period equal to:

(1993)

The period of the resultant wave formed by the superposition of two periodic waves is the least common multiple (LCM) of their individual periods. $$\text{LCM}(4, 3) = 12 \text{ seconds}$$.

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Question 62:

easy

For production of beats the two sources must have:

(1992)

Beats are the periodic variations in intensity of sound when two sound waves of slightly different frequencies superimpose. Thus, they must primarily have different frequencies.

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