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A closed organ pipe and an open organ pi...

A closed organ pipe and an open organ pipe of some length produce ` 2 beats ` when they are set up into vibration simultaneously in their fundamental mode . The length of the open organ pipe is now halved and of the closed organ pipe is doubled , the number of beats produced will be

A

7

B

4

C

8

D

2

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The correct Answer is:
A
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NCERT FINGERTIPS-PRACTICE PAPERS-Practice Paper 3
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  9. Which of the following is dimensionless?

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  10. Given vecF=(4hati-10hatj)and vecr=(5hati-3hatj). then torque vectau is

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  15. A liquid of density rho flows along a horizontal pipe of uniform cross...

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  16. A chain of uniform mass m and length L is held on a frictionless table...

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  18. Kepler's second law is based on

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  20. A hole is drilled in a copper sheet. The diameter of the hole is 4.24 ...

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  21. Two blocks M1 and M2 having equal masses are to move on a horizontal f...

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