An electric utility company supplies a customer's house from the main power lines (120 V) with two copper wires, each of which is 66.0 m long and has a resistance of 0.111 2 per 300 m. (a) Find the potential difference at the customer's house for a load current of 109 A. V (b) For this load current, find the power delivered to the customer. kw (c) Find the rate at which internal energy is produced in the copper wires. W

An electric utility company supplies a customer's house from the main power lines (120 V) with two copper wires, each of which is 66.0 m long and has a resistance of 0.111 2 per 300 m. (a) Find the potential difference at the customer's house for a load current of 109 A. V (b) For this load current, find the power delivered to the customer. kw (c) Find the rate at which internal energy is produced in the copper wires. W

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter9: Current And Resistance

Section: Chapter Questions

Problem 63P: Consider a power plant is located 60 km away from a residential area uses Q-gauge (A=42.40mm2) wire...

See similar textbooks

Similar questions

Consider a power plant is located 60 km away from a residential area uses Q-gauge (A=42.40mm2) wire ofcopper to transmit power at a current of I = 100.00 A.How much more power is dissipated in the copper wires than it would be in superconducting wires?
An electric utility company supplies a customer's house from the main power lines (120 V) with two copper wires, each of which is 50.0 m long and has a resistance of 0.108 2 per 300 m. (a) Find the potential difference at the customer's house for a load current of 110 A. For this load current, find (b) the power delivered to the customer and (c) the rate at which internal energy is produced in the copper wires.
A heating element using nichrome connected to a 230 V supply draws an initial current of 3.2 A which settles after a few seconds to a steady value of 2.8 A. What is the steady temperature of the heating element if the room temperature is 27.0 °C? Temperature coefficient of resistance of nichrome averaged over the temperature range involved is 1.70 × 10-4 °C-1.
A typical cellular phone consumes an average of about 1.32 W of electrical power and operates on 3.80 V. HINT (a) What average current (in A) does the phone draw from its battery? A (b) Calculate the energy (in J) stored in a fully charged battery if the phone requires charging after 6.83 hours of use.
1. a) Find the electrical resistance of a 0.5 cm long, 22-gauge silver wire, if the electrical conductivity of silver is 6.15 x 107 (0-m)-¹ at 20° C. The diameter of 22-gauge wire is 0.6438 mm at this temperature. b) If a potential difference of 10.0 µV is established across the wire, find the current and current density in the wire. Current density is given by J = 1/A, where A is the cross-sectional area of the wire. c) Find the magnitude of the electric field in the sample, assuming it is constant.
A wire 50.0 m long and 2.00 mm in diameter is connected to a source with a potential difference of 9.11 V, and the current is found to be 36.0 A. Assume a temperature of 20.0°C and, using the given table, identify the metal out of which the wire is made.
What current (in A) must be produced by a 12.0 V battery-operated bottle warmer in order to heat 80.0 g of glass, 200 g of baby formula, and 2.70 x 102 g of aluminum from 20.0°C to 90.0°C in 4.70 min? (Assume the specific heats of glass, baby formula, and aluminum are 840 J/(kg · °C), 4,186 J/(kg · °C), and 900 J/(kg · °C), respectively.) A
A solar cell, 3.0 cm square, has an output of 350 mA at0.80 V when exposed to full sunlight. A solar panel thatdelivers close to 1.3 A of current at an emf of 120 V to anexternal load is needed. How many cells will you need tocreate the panel? How big a panel will you need, and howshould you connect the cells to one another?
V mercury cell with a capacity of 2.5 A⋅h is used to power a cardiac pacemaker. (a) If the power required is 0.30 mW(1 mW =1 milliwatt =0.001 W), what is the average current?
5. A coil of Nichrome wire is 25.0 m long. The wire has a diameter of 0.400 mm and is at 20.0°C. If it carries a current of 0.500 A, what are: (a) the magnitude of the electric field in the wire and (b) the power delivered to it? (c) If the temperature is increased to 340°C and the potential difference across the wire remains constant, what is the power delivered? (Note: pNichrome = 100x10-8 2 · m)
If electrical energy costs $0.12 per kilowatt-hour, how much do the following events cost? (a) To burn a 120-W lightbulb for 24 h. I got .35 which was right.(b) To operate an electric oven for 3.2 h if it carries a current of 20.0 A at 220 V. I come up with $1.35 and it's wrong, Can you help?
Lightning is a bright flash of electricity produced by a thunderstorm. All thunderstorms produce lightning and are very dangerous. Lightning is an electric current: a natural phenomena and a typical one may transfer 109 J of energy across a potential difference of 50,000,000.00 V during a time interval of about 0.2 s. With the information given, calculate the total amount of charge transferred between the cloud and the ground, the current of lightning bolt, and the average power delivered over 0.2 s time.