A long wire with a radius of 0.400 cm carries a current. The potential difference across a 3.60 m long section of this wire is 12.0 V, and the wire carries a current of 0.370 A. (a) What is the resistance (in Ω) of the 3.60 m long section of wire? Ω (b) What is the resistivity (in Ω · m) of the wire? Ω · m

A long wire with a radius of 0.400 cm carries a current. The potential difference across a 3.60 m long section of this wire is 12.0 V, and the wire carries a current of 0.370 A. (a) What is the resistance (in Ω) of the 3.60 m long section of wire? Ω (b) What is the resistivity (in Ω · m) of the wire? Ω · m

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter9: Current And Resistance

Section: Chapter Questions

Problem 70AP: A 10.00-meter long wire cable that is made of copper has a resistance of 0.051 ohms, (a) What is the...

See similar textbooks

Similar questions

An aluminum wire 1.628 mm in diameter (14-gauge) carries a current of 3.00 amps, (a) What is the absolute value of the charge density in the wire? (b) What is the drift velocity of the electrons? (c) What would be the drift velocity if the same gauge copper were used instead of aluminum? The density of copper is 8.96 g/cm3 and thedensity of aluminum is 2.70 g/cm3. The molar mass ofaluminum is 26.98 g/mol and the molar mass of copper is 63.5 g/mol. Assume each atom of metal contributes one free electron.
A student uses a 100.00-W, 115.00-V radiant heater to heat the student’s dorm room, dining the hours between sunset and sunrise, 6:00 p.m. to 7:00 a m. (a) What current does the heater operate at? (b) How many electrons move through the heater? (c) What is the resistance of the heater? (d) How much heat was added to the dorm room?
Taking R = 1.00 k and = 250 V in Figure P21.49, determine the direction and magnitude of the current in the horizontal wire between a and e. Figure P21.49
Unreasonable Results (a) What current is needed to transmit 1.00 102 MW of power at 10.0kV? (b) Find the resistance of 1.00 km of wire that would cause a 0.0100% power loss. (c) What is the diameter of a 1.00-km-long copper wire having this resistance? (d) What is unreasonable about these results? (e) Which assumptions are unreasonable, or which premises are inconsistent?
Two 1.50-V batterieswith their positive terminals in the same directionare inserted in series into a flashlight. One battery has an internal resistance of 0.255 , and the other has an internal resistance of 0.153 . When the switch is closed, the bulb carries a current of 600 mA. (a) What is the bulbs resistance? (b) What fraction of the chemical energy transformed appears as internal energy in the batteries?
A 12.0-V emf automobile battery has a terminal voltage of 16.0 V when being charged by a current of 10.0 A. (a) What is the battery’s internal resistance? (b) What power is dissipated inside the battery? (c) At what rate (in °C/min ) will its temperature increase if its mass is 20.0 kg and it has a specific heat of 0.300 kcal/kg • °C, assuming no heat escapes?
A long wire with a radius of 0.400 cm carries a current. The potential difference across a 3.40 m long section of this wire is 15.0 V, and the wire carries a current of 0.450 A. (a) What is the resistance (in Ω) of the 3.40 m long section of wire? Ω (b) What is the resistivity (in Ω · m) of the wire? Ω· m
A long wire with a radius of 0.400 cm carries a current. The potential difference across a 3.00 m long section of this wire is 15.0 V, and the wire carries a current of 0.350 A. (a)What is the resistance (in Ω) of the 3.00 m long section of wire? Ω (b)What is the resistivity (in Ω · m) of the wire? Ω· m
A long wire with a radius of 0.350 cm carries a current. The potential difference across a 3.50 m long section of this wire is 12.0 V, and the wire carries a current of 0.350 A. (a) What is the resistance (in N) of the 3.50 m long section of wire? Ω (b) What is the resistivity (in Q · m) of the wire?
A long wire with a radius of 0.450 cm carries a current. The potential difference across a 3.10 m long section of this wire is 14.0 V, and the wire carries a current of 0.350 A. (a) What is the resistance (in 0) of the 3.10 m long section of wire? Ω (b) What is the resistivity (in N : m) of the wire? Ω. m
A silver wire with a circular cross-section has a mass of 1.45 g and a resistance of 0.790 Ω. At 20°C, the resistivity of silver is 1.59 ✕ 10−8 Ω · m and its density is 10,500 kg/m3. How long (in m) is the wire? m What is the diameter (in mm) of the wire? mm
A wire has a diameter of D = 0.95 cm and is L = 5.5 m long. When connected to a V = 24 V source the wire passes a I = 35 A current. What is the wire's resistivity in Ω⋅m?