A stop clock has a circular dial divided into $180$ divisions. What is its least count?

0.1 s

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0.25 s

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0.33 s

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0.5 s

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Solution

The correct option is C $0.33 s$
Time period of stop watch is $60$ seconds.
Number of divisions $N = 180$
So, least count of stop watch $L C = \frac{60}{180} = 0.33$ second

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