WAEC Physics 2012 Objective — Question 32
Question 32 of 50 from the West African Examinations Council (WAEC) Physics 2012 Objective paper, with the correct answer and a full explanation.
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Two sound waves have frequencies of 12Hz and 10Hz. Calculate their beat period.
- A. A. 0.5sCorrect
- B. B. 1.0s
- C. C. 1.2s
- D. D. 2.0s
Explanation
Beat frequency = f1 - f2 = 12-10 = 2Hz. Beat period = 1/beat frequency = 1/2 = 0.5s.
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