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A given pendulum has a spherical solid bob of aluminium.Its period is I sec. Now this bob is replaced by a spherical solid bob of the same diameter but made of iron. Density of aluminium is 2.7 g/cc and that of iron is 9.8 g/cc. The period of oscillation of the pendulum will now be:

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(26/9) sec

(9/27) sec

1 sec

2 sec

answer is C.

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Detailed Solution

Time period does not depend on density of bob.

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