Least count of a stop watch is 0.2, second . time of 20, oscillations of a pendulum is measured to b

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1.Units, Dimensions and Measurement

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The least count of a stop watch is $0.2\, second$. The time of $20\, oscillations$ of a pendulum is measured to be $25\, second$. The percentage error in the measurement of time will be ........ $\%$

A

$8$

B

$1.8$

C

$0.8$

D

$0.1$

Solution

$\frac{{0.2}}{{25}} \times 100 = 0.8$

Standard 11

Physics

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