WAEC Physics 2025 Objective — Question 8
Question 8 of 51 from the West African Examinations Council (WAEC) Physics 2025 Objective paper, with the correct answer and a full explanation.
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A note, K from a keyboard has an amplitude of 0.5 cm and frequency 2000 Hz. Another note, M from a guitar has an amplitude of 1.5 cm and frequency 2000 Hz. Which of the following statements is true if the two notes are compared?
- A. K is louder than M
- B. M is louder than KCorrect
- C. M has a higher pitch than K
- D. K and M have same timbre
Explanation
Loudness depends on amplitude; M has a larger amplitude (1.5cm) than K (0.5cm), so M is louder. Same frequency means same pitch, but different instruments (sources) give different timbre.
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