Standing Waves Quiz

A point on the string where the amplitude is at a maximum is called​ (a)   . A point where the amplitude is zero is called​ (b)  

• an antinode
• a node

A transverse wave moving along a slinky spring is​​ (a)   from a fixed end. The​ (b)   of this reflected wave and the original wave creates a​ (c)   wave. This wave consists of locations called nodes where​ (d)   interference has cancelled the movement of the spring and antinodes where​ (e)   interference has amplified the movement of the spring.

• reflected
• superposition
• standing
• destructive
• constructive

A transverse standing wave is produced using a rope. Which of the following statements about this standing wave is NOT correct?

• A node is a location on the rope where the minimum amplitude occurs

• An antinode is a location on the rope where the maximum amplitude occurs.

• Standing waves occur when the rope is stationary or ‘standing’ still.

• Standing waves are formed by the superposition of two waves of equal amplitude and frequency.

What is the wavelength of the fundamental mode of a standing wave on a string 0.4 m long and fixed at both ends?

• 0.2 m

• 0.3 m

• 0.4 m

• 0.8 m

A particular string of constant tension is fixed at both ends. It resonates showing four distinct loops at a frequency of 280 Hz. Classify the frequencies listed below as potential resonant frequencies for this string or ones that will not form resonant frequencies. Drag each frequency under the correct heading.

Groups:

(a) Resonant frequencies

,

(b) Non-resonant frequencies

• 140 Hz

• 210 Hz

• 320 Hz

• 240 Hz

• 160 Hz

• 200 Hz

• 70 Hz

• 560 Hz

The fundamental frequency of the A string on a violin is tuned to 440 Hz. The violin player wants to play a note on this string with a new fundamental frequency of 550 Hz. They know that they will need to press a finger somewhere along the string to change the note. If the string is originally 32.5 cm, how long will the string need to be when their finger is pressed on it (in cm)? Give your answer to 3 significant figures.