A current of 4.4 amperes is flowing in a wire. How many electrons pass a given point in the wire in one second, if the charge on an electron is 1.6 x 10^-19 Coulomb?
Correct answer: B. 2.75 x 10^19 electrons
- A. 1.5 x 10^19 electrons
- B. 2.75 x 10^19 electrons
- C. 3.25 x 10^19 electrons
- D. 2.75 x 10^15 electrons
- E. 3.25 x 10^17 electrons
Explanation
4.4 Amperes means that 4.4 coulomb of charge passes through the conductor in one second.1e contains 1.6x10-19 C , so 4.4 C will contain 4.4/1.6x10-19= 2.75x1019 electrons.
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