IdentificationEasy2 marks
7(iii)
The diagrams given below show two sound boxes A and B with wires of same length (l) and tension (10 kgf) but different cross-sectional areas. Simultaneously, vibrating tuning forks of frequency 300 Hz are placed on the boxes A and B. The paper rider falls off in case of B but not in case of A.
Name and explain the phenomenon responsible for the falling off of the paper rider in B.
Topic: Resonance
Question wording verified against source paper
Answer
Exam answer
Resonance.
Explanation
When the tuning-fork frequency equals the natural frequency of wire B, the wire vibrates with large amplitude and throws off the paper rider.
Example
Include one standard example only where it improves understanding.
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