First page Back Continue Last page Overview Image
- PHY102 Physics II © Dr.Cem Özdoğan
- The electric current is the amount of charge per unit time that passes through a plane that pass completely through the conductor.
- The total charge that passes through the plane in a time interval extending from 0 to t.
- The SI unit for current is the coulomb per second, or the ampere (A):
- Example: The electric current in a wire is 6 A. How many electrons flow past a given point in a time of 3 s?
- Recall that: 1 e- = 1.6 x 10-19 C, then convert:
- In 3 s: 1.12 x 1020 electrons
- Total number of electrons= 18 C / (1.6x10-19 C)