Ins. cm Observation Least Count of the metre scale east Count of the stop watch s 25. Time taken for 20 oscillations (t) S. No. Time period T=t/20 (s) Length of pendulum (1) (cm) TC ( 1. 70 cm 80 cm 2. 90 cm 100 cm 110 cm
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The least count of a stop watch is 0.2 s, The time of 20 oscillations of a pendulum is measured to be 25s. The percentage error in the time period is. = 0.8%.
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