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Which of the following time measuring de...

Which of the following time measuring devices is most precise ? (a) A wall clock. (b) A stop watch. (c ) A digital watch. (d) An atomic clock. Give reason for you answer.

Text Solution

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A wall clock can measure time correctly upto one second. A stop watch can measure time correctly upto a fraction of a second. A digital watch can measure time up to a fraction of second. An atomic clock can measure time most precisely as its precision is 1 s in `10^(13)` s.
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