Question

A current of 14.72 A passes through a wire. How many electrons pass through the wire in 22.94 seconds ?

Answer 1

Given data:

The current is I=14.72 A.

The time taken is t=22.94 s.

The charge pass through the wire can be calculated as,

`\begin{gathered} Q=It \\ Q=(14.72)(22.94) \\ Q=337.6\text{ C} \end{gathered}`

If the charge on an electron is e=1.6x10⁻¹⁹ C, the the number of electrons pass through the wire will be,

`\begin{gathered} n=(Q)/(e) \\ n=(337.6)/(1.6*10^(-19)) \\ n=211*10^(19) \end{gathered}`

Thus, the number of electrons pass through the wire in 22.94 s is 211x10¹⁹.

Final Answer: 211x10¹⁹