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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > A typical copper wire might have 2 × 10^21 free electrons in 1 cm of its length. Suppose that the dirft speed of the electrons along the wire is 0.05 cm/s. How many electrons would pass through a given cross section of the wire each second. How large would a current be flowing in the wire?

A typical copper wire might have 2 × 10^21 free electrons in 1 cm of its length. Suppose that the dirft speed of the electrons along the wire is 0.05 cm/s. How many electrons would pass through a given cross section of the wire each second. How large would a current be flowing in the wire?

How many electrons per second pass through a section of wire carrying a current of 0.7 A?