Question

A copper wire is 8.00 m long, and has a cross-sectional area of
1.00 × 10^{-4} m^{2}. This wire forms a 1turn loop
in the shape of a square and is then connected to a battery that
applies a potential difference of 0.100 V. If the loop is placed in
a uniform magnetic field of magnitude 0.400 T, what is the maximum
torque that can act on it? The resistivity of copper is 1.70 ×
10^{-8} Ω • m. Define Resistivity

Answer #1

A copper wire is 8.00 m long, and has a
cross-sectional area of 1.00 × 10–4 m2. This wire forms a 1turn
loop in the shape of a square and is then connected to a battery
that applies a potential difference of 0.100 V. If the loop is
placed in a uniform magnetic field of magnitude 0.400 T, what is
the maximum torque that can act on it? The resistivity of copper is
1.70 × 10–8 Ω · m. Define...

What current in a copper wire with a cross-sectional area of
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A 7.54 m long copper wire (ρcopper =
1.69×10-8 Ω.m) has a cross sectional area 6.96
mm2. If the wire is reshaped to twice its original
length with no change of volume, find its new wire resistance.

#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.

A silver wire has resistivity ρ = 1.73 × 10-8 Ω·m and a
cross-sectional area of 5.00 mm2. The current in the wire is
uniform and changing at the rate of 2100 A/s when the current is
80.0 A. (a) What is the magnitude of the (uniform) electric field
in the wire when the current in the wire is 80.0 A? (b) What is the
displacement current in the wire at that time? (c) What is the
ratio of the...

A 100-m-long copper wire of radius 0.19 mm is connected across a
1.5-V battery. Assume the resistivity of copper is 1.7 × 10−8
Omega⋅m. Determine the resistance of the wire. determine the
current through the resistor. Determine the power delivered by the
battery.

A 2.36-mm diameter copper wire (resistivity 1.68 ×
10-8Ω∙m) carries a current of 15.6 A. What is the
potential difference (in volts) between two points 194 m
apart?
A carbon resistor has a resistance of 19.17 Ω at a
temperature of 21.1 °C. At what temperature (in °C) its resistance
will drop to 12.93 Ω? (The temperature coefficient of resistivity
for carbon is -5.0 ×
10-4/C°.)
A battery with an emf of 5.87 volts and an
internal resistance 2.47 ohms...

A copper wire 100m long with cross-sectional area of 2x10^-4
cm^2 is heated from room temperature of 25 C to 200 C. Find
a) The initial resistance of wire
b) The increase in resistance from 25 to 200 C
c) The drift speed of the “electron group” in the wire, if the
current is 3A and density of
electrons is 8.5x10^28 electrons /m 3
d) The voltage drop across the wire resistor for this current of
3A
e) The power...

A
2-wire d.c. distributor, 500 m long is fed at one of its ends. The
cross-sectional area of each conductor is 34 cm^2 and the
resistivity of copper is 1.7x10^-6 Ohm cm. The distributor supplies
200 A at a distance of 300m from the feeding point and 100 A at the
terminus. Calculate the voltage at the feeding end if the voltage
at the terminus is to be 230 V.

a. A 3 m long wire carrying a current of 1. 06 Ampere forms a
2-turn loop in the shape of an equilateral triangle. If the loop is
placed in a constant uniform magnetic field with a magnitude of
0.734 T, determine the maximum torque that acts on it.
b. Given an iron core solenoid with 16 turns of wire, 38 cm long
and diameter of 99 cm. When 48A current flows in the wire, it was
found that the...

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