MCQ
One millionth of a metre is:
  • A
    Millimetre.
  • Micrometre.
  • C
    Nanometre.
  • D
    Centimetre.

Answer

Correct option: B.
Micrometre.

A micrometre is also known as a micron. It is an $SI$ derived unit of length. Its value is $1 \times 10^{-6}$ metres or one millionth of a metre.

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