Question

A transverse wave is traveling along a string in the positive x-axis. The figure shows the photograph of the wave at an instant.
The points moving upward are _____.

• A. D, E and F
• B. A, B, H and I
• C. C and G
• D. A, E, and I

Answer 1

The correct option is A

D, E and F

Method 1: The dotted curved in the figure represents the position of the wave at a later instant. It can be easily obtained from the figure that

a. Points D, E and F move upward.

b. Points A, B, H and I move downward.

c. Points C and G have zero velocity.

d. Points A, E, and I have the maximum velocity.