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The least count of a stopwatch is 0.2 s....

The least count of a stopwatch is 0.2 s. A student found the time of 25 oscillations of a simple pendulum to be 50 second. What will be the percentage error in the measurement of time?

A

`0.2%`

B

`0.4%`

C

`0.01%`

D

`1.5%`

Text Solution

Verified by Experts

The correct Answer is:
b
The error can be equal to the least count of the stopwatch i.e. 0.2 s = `Deltat` and t = 50 s
`therefore` Percentage error `=((Deltat)/(t))xx100`
`=(0.2)/(50)xx100=0.4%`
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Knowledge Check

  • 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

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