Question

Kinetic energy per unit length for a particle in a standing wave is zero at:

• A. nodes
• B. antinodes
• C. mid-way between a node and an antinode
• D. None of the above

Answer 1

The correct option is B antinodes

Particle at antinodes is momentarily at rest and hence has zero kinetic energy. Its speed comes down to zero at this point and all energy is stored in the form of potential energy.