Problem 1. A copper wire of cross-sectional area 2.5 mm2 carries a current with a current density of 2.60 A/mm2 . The density of free electrons for copper is 9.5x1028 electrons per cubic meter. The resistivity of copper is 1.68x10−8 ·m. The charge of the electron is 1.6x10−19 C. (a) Calculate the current in the wire. (b) The magnitude of the drift velocity of electrons in the wire. (c) Find the electric field inside the wire.
Problem 1. A copper wire of cross-sectional area 2.5 mm2 carries a current with a current density of 2.60 A/mm2 . The density of free electrons for copper is 9.5x1028 electrons per cubic meter. The resistivity of copper is 1.68x10−8 ·m. The charge of the electron is 1.6x10−19 C. (a) Calculate the current in the wire. (b) The magnitude of the drift velocity of electrons in the wire. (c) Find the electric field inside the wire.
Chapter9: Current And Resistance
Section: Chapter Questions
Problem 28P: An aluminum wire 1.628 mm in diameter (14-gauge) carries a current of 3.00 amps, (a) What is the...
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Problem 1. A copper wire of cross-sectional area 2.5 mm2
carries a current with a current density of
2.60 A/mm2
. The density of free electrons for copper is 9.5x1028 electrons per cubic meter. The
resistivity of copper is 1.68x10−8 ·m. The charge of the electron is 1.6x10−19 C.
(a) Calculate the current in the wire.
(b) The magnitude of the drift velocity of electrons in the wire.
(c) Find the electric field inside the wire.
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