Current Electricity Problems - Numerical 05

Calculate the drift velocity of electrons in a silver wire having cross-sectional area of 3.14 x 10^-⁶ m² and carrying a current of 20 amperes. Given: Avogadro's number = 6.023 x 10²³, atomic weight of silver = 108. Density of silver = 10.5 x 10³ kg m^-3, e = 1.6 x 10^-19C.

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Suggested solution:

Suggested solution:

Since the valency of silver is 1, therefore each atom of silver contributes one free electron.

108 kg of silver contains 6.023 x 10²⁶ atoms.

Number of electrons per unit volume of silver,

Now,