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Which of the following gives the most accurate result for time measurement?

(a) Wall clock

(b) Digital watch

(c) Quartz clock

(d) Atomic clock

I had been asked this question by my school teacher while I was bunking the class.

The above asked question is from Measurement of Time in division Units and Measurements of Physics – Class 11

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Right option is (d) Atomic clock

For explanation: Atomic clocks are the most accurate devices for time measurement. The most accurate atomic clock is the caesium atomic clock situated in Switzerland.

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