IIT JEE 2006 Paper : PHYSICS Section I - Multiple Choice

Each question below has only one correct answer.
In the IIT-JEE, you will be awarded 3 marks for each correct answer and −1 for each incorrect answer.
You will be awarded 0 marks for not attempting a question.

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Multiple choice

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A massless rod BD of length L is suspended by two identical strings AB and CD of equal length as shown in the figure. A block of mass m is suspended at a point P. If the fundamental frequency of the string AB is equal to the second harmonic frequency of the string CD when excited by a tuning fork, then the length BP is   4L/5   L/5   L/4   3L/4   Hint Half-n-half Clue

 

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