ICSE Class 10 Physics 2015 Solved Paper

In the diagram below, A,B,C,D are four pendulums suspended from the same elastic string PQ. The length of A and C are equal to each other while the length of pendulum B is smaller than that of D. Pendulum A is set into a mode of vibrations.

Question : 51

Total: 74

What is the state of pendulum C ?

Solution:

Since the length of pendulum C is same as that of A therefore it is in the state of resonance.

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