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⚛️ Physics  ·  Waves  ·  NEET & JEE

Amplitude of a sound wave determines its:

Answer: Loudness.

  • A Pitch
  • B Frequency
  • C Loudness
  • D Quality

Correct answer: C. Loudness

Explanation: Loudness depends on amplitude. Greater amplitude means more energy and louder sound.

Standing Wave: Nodes and Antinodes (Open Pipe, 2nd Harmonic)nodenodenodeantinodeantinodeSolid and dashed lines show the string/air column at two instants - nodes never move

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.

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