Answer: 2 times.
- A √2 times
- B 2 times
- C 4 times
- D half
Correct answer: B. 2 times
Explanation: v ∝ √T, so 4× tension gives √4 = 2 times the speed.
A standing wave forms from two identical waves travelling in opposite directions and interfering; nodes (always zero displacement) and antinodes (maximum displacement) stay fixed in place, unlike a travelling wave where the whole pattern moves.
Concept context
Wave types, superposition, standing waves, Doppler effect, and sound intensity.