Express the following information in the standard form:
The diameter of a wire on a computer chip is $0.000005$ cm

5 \times 10^{- 6}

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5 \times 10^{- 7}

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5 \times 10^{- 5}

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None of these

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Solution

The correct option is B $5 \times 10^{- 6}$
The diameter of a wire on a computer chip $= 0.000005$ cm
$0.000005 = 0.000005 c m \times$ $\frac{10^{6}}{10^{6}}$
$= 5 \times 10^{- 6}$

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