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Question

$1 ˚ A$ is equal to
$10^{- 8}$ cm
$10^{- 3}$ cm
$10^{- 4}$ cm
$10^{- 6}$ cm

A

10^{- 6}

cm

B

10^{- 8}

cm

C

10^{- 4}

cm

D

10^{- 3}

cm

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Solution

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The Angstrom is a unit of length equal to 10 $^{- 10}$ m (one ten-billionth of a metre) or 0.1 nm. Its symbol is a letter in the Scandinavian alphabets. 1 $˚ A$ = 10 $^{- 8}$ cm, 10 $^{- 4}$ µm, 0.1 nm, 100 pm.
Hence, option A is correct.

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