A conductor typically possesses free electrons per cubic meter.

10^{17}

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10^{29}

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10^{48}

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Solution

The correct option is B $10^{29}$
Any conducting material such as iron or copper even when not connected to any electric circuit, contains about $10^{29}$ free electrons per $m^{3}$ . These free electrons have high speed because of their thermal energy.

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