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One millionth...

Question

One millionth of a metre is

A

Millimetre

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B

Micrometre

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C

Nanometre

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D

Centimetre

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Solution

The correct option is B Micrometre
A micrometre is also known as a micron. It is an SI derived unit of length. Its value is 1×10 $^{- 6}$ metres or one millionth of a metre. Thus the correct answer is option B.

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