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JEE Main 2013 Physics question

PhysicsOscillationsJEE Main 2013

Two simple pendulums of length 1 m and 4 m respectively are both given small displacement in the same direction at the same instant. They will be again in phase after the shorter pendulum has completed number of oscillations equal to:

Answer: (1)

Solution

, so the periods are in the ratio 1 : 2. When the shorter pendulum

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Question ID VK-103905