A 205-kV power transmission line carrying 500 A is hung from grounded metal towers by ceramic insulators, each having a 1.40 x 10°2 resistance. (a) What is the resistance to ground of 70 of these insulators? (Assume the insulators are connected in parallel.) (b) Calculate the power dissipated by 70 of them. (c) What fraction of the power carried by the line is this? Protal

A 205-kV power transmission line carrying 500 A is hung from grounded metal towers by ceramic insulators, each having a 1.40 x 10°2 resistance. (a) What is the resistance to ground of 70 of these insulators? (Assume the insulators are connected in parallel.) (b) Calculate the power dissipated by 70 of them. (c) What fraction of the power carried by the line is this? Protal

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?
A high tension (HT) supply of, say, 6 kV must have a very large internal resistance. Why?
Although caution must be used in applying ρ = ρ0(1 + αΔT) and R = R0(1 + αΔT) for temperature changes greater than 100 °C , for tungsten, the equations work reasonably well for very large temperature changes. A tungsten filament at 20 °C has a resistance of 0.350 Ω . What would the resistance be if the temperature is increased to 2850 °C ?
The temperature coefficient of a certain conducting material is 4.78 × 10-3 (°C)-1. (a) At what temperature would the resistance be 3 times the resistance at 20.0°C? (Use 20.0°C as the reference point in ρ-ρ0=ρ0α(T-T0).) (b) Does this temperature hold for all copper conductors, regardless of shape or size?
A 15.5 V battery is connected to a 102 Ωresistor.Neglecting the internal resistance of thebattery, calculate the power dissipated in theresistor.Answer in units of W.
Using the exact exponential treatment, find how much time (in s) is required to charge an initially uncharged 120 pF capacitor through a 67.0 MΩ resistor to 91.0% of its final voltage. __________s
The emf of a battery is E = 12 V . When thebattery delivers a current of 1 A to a load, thepotential difference between the terminals ofthe battery is 10 V volts.Find the internal resistance of the battery.Answer in units of Ω.
How much electrical energy is transferred to thermal energy in 2.00 hrs by an electricalresistance of 400 ohms when the potential applied across it is 90.0V?
A 240-kV power transmission line carrying 5.00×102 A is hung from grounded metal towers by ceramic insulators, each having a 1.00×109 -Ω resistance. (a) What is the resistance to ground of 100 of these insulators?(b) Calculate the power dissipated by 100 of them. (c) What fraction of the power carried by the line is this?
A person with body resistance between his hands of 10.0 kΩ accidentally grasps the terminals of a 20.0-kV power supply. (Do NOT do this!) If the internal resistance of the power supply is 2000Ω , what is the current through his body?
A power transmission line carries 520 A of current at a voltage of 924 kV. If the line has a resistance of 48 u/m, what is the rate at which energy is being dissipated (in kW) over 509 km of line? Be fast.. asap
You connect a 10.0 MΩ resistor in series with a 3.20 mFcapacitor and a battery with emf 9.00 V. Before you close the switchat t = 0 to complete the circuit, the capacitor is uncharged. Find the fraction of the initial current present at t = 18.0 s