Stationary waves Quiz
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5 questions, one answer each
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1. A string fixed at both ends vibrates in its fundamental mode. How many nodes does it have, including the ends?
- A. 1
- B. 2
- C. 3
- D. 4
2. A string has v = 80 m s⁻¹ and length 0.50 m. What is the fundamental frequency?
- A. 40 Hz
- B. 160 Hz
- C. 80 Hz
- D. 320 Hz
3. The tension in a string is increased by a factor of 9. What happens to the wave speed?
- A. It increases by a factor of 3
- B. It increases by a factor of 9
- C. It increases by a factor of 81
- D. It stays the same
4. Which pair of points on a stationary wave oscillates in phase?
- A. Two points in adjacent loops
- B. Two points in the same loop
- C. A node and an antinode
- D. Two points either side of a node
5. A string has μ = 2.0 × 10⁻³ kg m⁻¹ and tension 32 N. What is the speed of a transverse wave on it?
- A. 16 m s⁻¹
- B. 4.0 m s⁻¹
- C. 8.0 × 10² m s⁻¹
- D. 1.3 × 10² m s⁻¹