The least count of a stopwatch is 0.2 s . The time of 20 oscillations of a pendulum is measured to be 25 s . The percentage error in the measurement of the time period will be

Question

The least count of a stopwatch is 0.2 s . The time of 20 oscillations of a pendulum is measured to be 25 s . The percentage error in the measurement of the time period will be, 8 %, 1 . 8 %, 0 . 8 %, 0 . 1 %

MARKS App · Accepted Answer

p e r c e n t a g e e r r o r = l e a s t c o u n t T o t a l t i m e × 100 0.2 25 × 100 = 0.8%

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