Question

A
260-km-long high-voltage transmission line 2.00 cm in diameter
carries a steady current of 1,140 A. If the conductor is copper
with a free charge density of 8.50 1028 electrons per cubic meter,
how many years does it take one electron to travel the full length
of the cable?

Answer #1

A 280-km-long high-voltage transmission line 2.00 cm in diameter
carries a steady current of 1,250 A. If the conductor is copper
with a free charge density of 8.50 1028
electrons per cubic meter, how many years does it take one electron
to travel the full length of the cable? (Use
3.156 107 for the number of seconds in a
year.)

A 280-km-long high-voltage transmission line 2.00 cm in diameter
carries a steady current of 1,100 A. If the conductor is copper
with a free charge density of 8.50 1028
electrons per cubic meter, how many years does it take one electron
to travel the full length of the cable? (Use
3.156 107 for the number of seconds in a
year.)
yr

A small but measurable current of 1.2ʠ10 10 A exists in a copper
wire whose diameter is 2.5 mm. If the charge carrier density in
copper is 8.47(1028 electrons per cubic meter, calculate the
electron drift speed

A copper wire that has a diameter of 2.00 mm carries a current
of 10.0 A. Assuming that each copper atom contributes one free
electron to the metal, calculate the drift speed of the electrons
in the wire. The molar mass of copper is 63.5 g/mol and the density
of copper is 8.95 g/cm3.

A high-voltage transmission line with a resistance of 0.28 Ω/km
carries a current of 1030 A. The line is at a potential of 670 kV
at the power station and carries the current to a city located 155
km from the station.
(a) What is the power loss due to resistance in the line?
MW
(b) What fraction of the transmitted power does this loss
represent?
%

A copper wire with diameter of 1,5 mm and length of 4m carries
constant current of 1.75 A. The free electron density in the wire
is 8,5x1028 m-3. The resistivity of copper is 1,72x10-8 capital
omega.m. Calculate
a) current density,
b)drift velocity,
c) magnitude of electric field,
d) potential between the terminals of wire,
e)power dissipated as heat
f) mean free time. (mass of electron: 9,1x10-31kg, magnitude of
charge of electron: 1,6x10-19 C)

A copper wire with diameter of 1,5 mm and length of 4m carries
constant current of 1.75 A. The free electron density in the wire
is 8,5x1028 m-3. The resistivity of copper is
1,72x10-8 .m. Calculate
a) current density,
b)drift velocity,
c) magnitude of electric field,
d) potential between the terminals of wire,
e)power dissipated as heat
f) mean free time. (mass of electron: 9,1x10-31kg,
magnitude of charge of electron: 1,6x10-19 C)

1) 2 point charges are separated by a distance of 8 cm. The left
charge is 48 mC and the right charge is -16mC. Using a full sheet
of paper: draw the 2 charges separated by 8cm, centered in the
sheet. (if you are missing a ruler estimate 8cm as ⅓ a paper sheet
length). [6] a) Draw field lines to indicate the electric fields
for this distribution. [4] b) Draw 3 equipotential surfaces, 1
each, that pass: -Through the...

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