Practice question
Question
Two waves of frequencies 500 Hz and 504 Hz interfere to produce beats. How many beats are heard in 10 seconds?
Explanation
Given:
Two waves of frequencies 500 Hz and 504 Hz interfere to produce beats. How many beats are heard in 10 seconds?
Formula:
Beat frequency: v_{beat = v_1 - v_2 = 504 - 500 = 4 Hz.
Substitution & Calculation:
Beats in 10 s: 4 × 10 = 40 .
Final Result:
The computed value matches expected outcome and confirms correct choice as per latest NCERT 2026-27.
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