Suppose two square wave pulses that are in the same plane could be created on a string, one with a maximum displacement of 4 cm and the other with a maximum displacement of 2 cm. Which of the following is a possible displacement of the string when the wave pules overlap?

A) 2 cm

B) 3 cm

C) 6 cm

D) 8 cm

2 cm and 6 cm.

Explanation:

The maximum displacement of first square wave pulse is 4 cm and the maximum displacement of second square wave pulse is 2 cm. We need to find a possible displacement of the string when the wave pules overlap.

It could be result in constructive interference or destructive interference. The possible displacement of the string are:

4 cm - 2 cm = 2 cm

4 cm + 2 cm = 6 cm

Hence, the correct options are (A) and (C).