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In a simple pendulum experiment, length is measured as 31.4 cm with an accuracy of 1mm. The time for 100 oscillations of pendulum is 112 s with an accuracy of 0.01s. The percentage accuracy in g is

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a

1

b

2.8

c

1.3

d

2.1

answer is D.

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Detailed Solution

g=4π2lT2;Δgg×100=Δll×100+2ΔTT×100

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