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Which of the following time measuring devices is most precise?

(a) A wall clock.

(b) A stopwatch.

(c) A digital watch.

(d) An atomic clock.

Give reason for your answer.

Answers (1)

The least counts of the devices are as follows-

Wall clock = 1 sec

Stopwatch = $\frac{1}{10}$ sec

Digital watch = $\frac{1}{100}$ sec &

Atomic clock = $\frac{1}{10^{13}}$ sec.

Hence, the atomic clock is the most precise.

Posted by

infoexpert22

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