The speed at which electric current travels in a conductor is nearly

3 \times 10^{4} m s^{- 1}

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3 \times 10^{5} m s^{- 1}

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3 \times 10^{6} m s^{- 1}

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3 \times 10^{8} m s^{- 1}

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Solution

The correct option is C $3 \times 10^{8} m s^{- 1}$
In a conductor , the speed of electric field is almost equal to $c = 3 \times 10^{8} m / s$ .

Hence, this is the speed with which electric current travels in a conductor.

Though the drift speed is of the order of $10^{- 3} m / s$ and the speed of electrons is of the order of $10^{6} m / s$ .

The current starts flowing as soon as the electron starts drifting and hence the speed of current is same as that of electric field that is nearly $3 \times 10^{8} m / s$ .

Answer-(D)

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