Copper has 8.5Ý1028 electrons per cubic meter. (A) How many electrons are there

Question

Copper has 8.5Ý1028 electrons per cubic meter. (A) How many electrons are there in a 35.0cm length of 12-gauge copper wire (diameter 2.05 mm)?

(B)If a current of 2.15A

is flowing in the wire, what is the average drift speed of the electrons along the wire? (There are 6.24Ý1018 electrons in 1 coulomb of charge.)

Copper has 8.5 1028 electrons per cubic meter. (A) How many electrons are there in a 35.0cm length of 12-gauge copper wire (diameter 2.05 mm)? (B)If a current of 2.15A is flowing in the wire, what is the average drift speed of the electrons along the wire? (There are 6.24Ã?1018 electrons in 1 coulomb of charge.) Copper has 8.5times1028 electrons per cubic meter. How many electrons are there in a 35.0cm length of 12-gauge copper wire (diameter 2.05 mm)? Express your answer using two significant figures. If a current of 2.15 A is flowing in the wire, what is the average drift speed of the electrons along the wire? (There are 6.24times1018 electrons in 1 coulomb of charge.) Express your answer to two significant figures and include the appropriate units.

Explanation / Answer

a)Volume=pi*r^2*h=1.16*10^-6m^3

No. of electrons=V*N=9.8*10^22 electrons.

b)v=I/nAq=2.15/(8.5*10^28*pi*(2.05/2000)^2*1.6*10^-19)=4.8*10^-5m/s

Related Questions

Navigate

• Browse (All)
• Browse C
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.