Physics Waves ETEA 2016
PMDC Verified Question 112 of 125
In stationary wave
A
There is not transfer of energy
B
Energy is constant at all points
C
Phase is the same for al points
D
Both 'A' & 'B'
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option A: There is not transfer of energy
Concept:

Stationary (or standing) waves are formed by the superposition of two identical waves traveling in opposite directions.

Solution:

  • Because the two parent waves carry equal amounts of energy in mutually opposite directions, the net flow of energy across any section of the medium is zero.


  • Energy remains confined between the nodes; thus, there is no transfer of energy through space.


Why other options are incorrect:

Option B is incorrect because energy is not constant at all points; antinodes possess maximum kinetic/potential energy oscillation, while nodes have zero. Option C is wrong because adjacent loops are completely out of phase.

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