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Q.

In an experiment with bar pendulum having four holes, the same time period is recorded when it is suspended at distances 12 cm, 24cm, 40 cm and 52 m respectively from one end. The length of bar pendulum is

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a

60 cm

b

72 cm

c

84 cm

d

64 cm

answer is C.

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Detailed Solution

The time is same when it is suspended at 12 cm and 52 cm, then l=12+52=64 cm

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In an experiment with bar pendulum having four holes, the same time period is recorded when it is suspended at distances 12 cm, 24cm, 40 cm and 52 m respectively from one end. The length of bar pendulum is