Question

Find the ratio of the diameter of aluminum to copper wire, if
they have the same resistance per unit length (as they might in
household wiring). The resistivity of Aluminum is 2.65 x
10^{-8} Ω m ; the resistivity of copper is 1.72 x
10^{-8} Ω m.

Answer #1

* *

* *

* *

Calculate the ratio of the resistance of 14.0 m of aluminum wire
1.5 mm in diameter, to 28.0 m of copper wire 2.9 mm in diameter.
Assume electrical resistivity of aluminum is 2.65×10−8 Ω⋅m and
electrical resistivity of copper is 1.68×10−8 Ω⋅m.

Calculate the ratio of the resistance of 15.0 m of aluminum wire
2.3 mm in diameter, to 26.0 m of copper wire 1.9 mm in diameter.
The resistivity of copper is 1.68×10−8Ω⋅m and the resistivity of
aluminum is 2.65×10−8Ω⋅m. Express your answer using two significant
figures.

If
the diameter of a copper wire is 9.52 mm, find the resistance of a
20.00 km length of copper wire (such wire used for power
transmission).
The resistivity of the copper is 1.72 x 10^-8 Ohm meter

1.
A 10.0 m length of wire consists of 5.0 m of copper, followed by
5.0 m of aluminum. Both have a diameter of 1.4 mm. A potential
difference of 95 mV is placed across the composite wire.
*Note* the resistivity of copper is 1.68 x 10
-8 Ohm * m and the resistivity of aluminum is
2.65 x 10 -8 Ohm * m
A. (worth 10 points) What is the equivalent
Resistance of the composite wire?
B. (worth 5 points) What...

Problem 11: A particular aluminum
transmission line has a resistance per length of 0.066 Ω/km. Assume
aluminum has a resistivity of 2.65 × 10-8 Ω⋅m and a
density of 2.70 × 103 kg/m3.
Part (a) What is the mass of one kilometer of
this line, in kilograms?
mA1=________
Part (b) What is the mass, in kilograms per
kilometer, of a copper line having the same resistance as the
aluminium one? Copper has a resistivity of 1.72 × 10-8
Ω⋅m and...

A certain laboratory experiment requires an aluminum wire of
length of 40.0 m and a resistance
of 4.10 Ω at 20.0°C. What diameter wire must be used? (The
resistivity of aluminum
at 20.0°C is 2.82 ✕ 10−8 Ω · m.)

A 2 m long gauge 14 copper wire (diameter 1.624 mm, resistivity
1.72 × 10-8 Ωm) replaces a similar 2 m long copper wire but of
gauge 20 (diameter 0.812 mm). The resistance of the new wire is
then that of the original wire.

#4. A copper wire is 250 m long and it has a diameter of 0.225 mm.
The resistivity of copper is 1.7 x 10-8 -m. A battery of
negligible internal resistance and emf of 35.0 v is connected
across this wire.
a) Find the resistance of the wire.
b) Find the current through the wire.

An insulated copper wire with a length of 1.2 m carries 20 A of
current. The copper is 1 mm in diameter and the insulation (k=0.13
W/m. ºC) has a thickness of 0.8 cm. The wire has electrical
resistance of 0.0321 Ω. Air at 25 ºC blows in crossflow over the
wire to produce an external convective heat transfer coefficient of
219 W/m2. K. Assuming the copper is isothermal, find the copper
temperature. Take the electrical resistivity of copper to...

Copper has 8.5 x10^28 electrons per m^3 . A 71 cm length of
copper wire of diameter 2.05 mm carries 4.85A of current. ( For
copper: ρ = 1.72 x 10^-8 ohm-m) a. How much time does it take an
electron to travel the length of the wire ? b. Find the electric
field inside the wire. c. What is the resistance of this wire?

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 1 minute ago

asked 1 minute ago

asked 1 minute ago

asked 14 minutes ago

asked 29 minutes ago

asked 31 minutes ago

asked 31 minutes ago

asked 40 minutes ago

asked 40 minutes ago

asked 45 minutes ago

asked 47 minutes ago

asked 48 minutes ago