Physics Waves ETEA 2014
PMDC Verified Question 116 of 125
In a vibrating cord the point where the particles are stationary is called
A
Crest
B
Anti-node
C
Node
D
Trough
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option C: Node
Concept:

When stationary (standing) waves form on a cord, they create an alternating pattern of complete destructive and constructive interference.

Solution:

  • A Node is a specific point along the standing wave where the interfering waves consistently cancel each other out, resulting in zero net displacement (stationary particles).


  • An Anti-node is a point of maximum displacement.


Why other options are incorrect:

Crests and troughs are moving features of a progressive wave, whereas nodes represent fixed zero-displacement locations.

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