Question

In: Physics

A number 14 copper wire has a diameter of 1.628 mm. Calculate the resistance of a...

A number 14 copper wire has a diameter of 1.628 mm. Calculate the resistance of a 34.0 m long piece of such wire.
(Use 1.72×10-8 Ωm for the resistivity of copper.)

2.809×10-1 Ohm
For safety, the National Electrical Code limits the allowable amount of current which such a wire may carry. When used in indoor wiring, the limit is 15.0 A for rubber insulated wire of that size. How much power would be dissipated in the wire of the above problem when carrying the maximum allowable current?

6.321×101 W

What would be the voltage between the ends of the wire in the above problem?

4.214 V

What is the current density in the wire when it is carrying the maximum allowable current? (Current density is the current in the wire divided by the cross sectional area of the wire.)

NEED HELP
What is the drift velocity of the electrons when the wire is carrying the maximum allowable current?
(The density of electrons in copper is 8.47×1028 m-3.)

NEED help

Solutions

Expert Solution


Related Solutions

What is the resistance of a 2.9-m length of copper wire 1.4 mm in diameter?
What is the resistance of a 2.9-m length of copper wire 1.4 mm in diameter? The resistivity of copper is 1.68×10-8Ω⋅m.
How much 1.0 mm diameter copper wire would it take to equal the resistance of one...
How much 1.0 mm diameter copper wire would it take to equal the resistance of one 100 Ω resistor? The resistivity of copper is 1.68*10-8 Ωm b) What would be the current if this wire was connected to a 12.0 V battery? c) How many electrons per second pass by a point on the wire? d) If this wire was coiled up and submerged in 100 mL of water at 20oC, how long would it take for the water to...
A copper wire has a radius of 1.0 mm. What is the resistance of 2m of...
A copper wire has a radius of 1.0 mm. What is the resistance of 2m of the wire at 0 degrees C? A. 6.3 microOhms B. 9.9 microOhms C. 6.3 nanoOhms D. 9.9 milliOhms
1-What is the resistance of a 5km long copper wire with a diameter of 4mm? a....
1-What is the resistance of a 5km long copper wire with a diameter of 4mm? a. 1.65 ohms b. 0.0015 ohms c. .0065 ohms d. 6.7 ohms 2- three 4mF capacitor are connected in series across a 12 V battery. The total charges stored by this compination of capacitor is A. 24 mC B. 16 mC C. 48 mC D. 144 mC E. None of the above 3. What would be the energy stored in the capacitor in the previous...
A copper wire has a diameter of 3.247 mm. What magnitude of current flows when the...
A copper wire has a diameter of 3.247 mm. What magnitude of current flows when the drift velocity is 4.40 mm/s? Take the density of copper to be 8.92 g/cm3. Give your answer in Amperes. PLEASE PLEASE PLEASE answer correctly
   A copper wire with diameter of 1,5 mm and length of 4m carries constant current of...
   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)
If 47.0 cm of copper wire (diameter = 1.00 mm) is formed into a circular loop...
If 47.0 cm of copper wire (diameter = 1.00 mm) is formed into a circular loop and placed perpendicular to a uniform magnetic field that is increasing at a constant rate of 10.5mT/s, at what rate is thermal energy generated in the loop? _______________ W
A 0.500 mm diameter copper wire makes up a 136 turns, 7.60 cm diameter coil. There...
A 0.500 mm diameter copper wire makes up a 136 turns, 7.60 cm diameter coil. There is a magnetic field parallel to the axis of the coil. If the induced current in the coil is 2.80 A, what is the rate of change of the magnetic field? a) 0.0839 T/s b) 3.63×10-6 T/s c) 12.8 T/s d) 1.74×103 T/s
A length of 20-gauge copper wire (of diameter 0.8118 mm) is formed into a circular loop...
A length of 20-gauge copper wire (of diameter 0.8118 mm) is formed into a circular loop with a radius of 24.0 cm. A magnetic field perpendicular to the plane of the loop increases from zero to 18.0 mT in 0.20 s. Find the average electrical power dissipated in the process.
A given copper wire has a resistance of 5.10 ? at 20.0°C while a tungsten wire...
A given copper wire has a resistance of 5.10 ? at 20.0°C while a tungsten wire of the same diameter has a resistance of 4.67 ? at 20.0°C. At what temperature will the two wires have the same resistance?
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT