Which unit should be used to express thickness of a wire?

Kilometre

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Both kilometre and metre

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Millimetre

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Metre

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Solution

The correct option is C Millimetre
Very small length like thickness of a coin or a wire is expressed in millimetre(mm).
$1 m m = 10^{- 3} m$

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Similar questions

Which appropriate unit is used to measure the thickness of the thin copper wire?

(a) Name the material used for making the connection wires. Give a reason for your answer.
(b) Why should a connection wire be thick?

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