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Measuring Length and Zero Error

The diameter ...

Question

The diameter of a ball ‘d’ measured against a measuring scale as shown is:

A

5 mm

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B

0.5 m

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C

0.5 cm

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D

5 m

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Solution

The correct option is A 5 mm

Markings 0 to 1 have been divided into 10 parts. So, one part is 1/ 10 cm long or 1 mm long. The diameter of the ball spreads over 5 such divisions. So, the diameter ‘d’ of the ball is 5 mm

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