A transmission line that has a resistance per unit length of 4.00 x 10-4 a /m is to be used to transmit 5.00 MW over 400 miles (6.44 x 105 m). The output voltage of the generator is 4.50 kV. (a) What is the line loss if a transformer is used to step up the voltage to 550 kV? kW (b) What fraction of the input power is lost to the line under these circumstances? Pļoss / P : (c) What difficulties would be encountered in attempting to transmit the 5.00 MW at the generator voltage of 4.50 kV?

A transmission line that has a resistance per unit length of 4.00 x 10-4 a /m is to be used to transmit 5.00 MW over 400 miles (6.44 x 105 m). The output voltage of the generator is 4.50 kV. (a) What is the line loss if a transformer is used to step up the voltage to 550 kV? kW (b) What fraction of the input power is lost to the line under these circumstances? Pļoss / P : (c) What difficulties would be encountered in attempting to transmit the 5.00 MW at the generator voltage of 4.50 kV?

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

See similar textbooks

Similar questions

A typical wall outlet voltage in the United States is 120 volts. Personal MP3 players require much smaller voltages, typically 104.2 mV. If the number of turns in the primary coil is 6908, calculate the number of turns Ng on the secondary coil of the adapter transformer. Ns turns
The primary coil of a transformer has 100 loops and is connected to a circuit with 120 volts (primary voltage). What is the output voltage (secondary voltage) if the secondary coil has 50 loops?
A transformer has 900 turns on its secondary and 100 turns on its primary. The primary is connected to a 18-V source. (a) What is the voltage output of the secondary? V(b) If 3 A flows in the primary coil, how much current is there in the secondary coil? A
A transformer has 472 turns on its primary and 108 turns on its secondary. (a) Is this a step-up or a step-down transformer? (b) If a voltage of 103 V is applied to the primary and a current of 0.4 A flows in these windings, what are the voltage output of the secondary and the current in the secondary?voltage Vcurrent A
The plug-in transformer for a laptop computer puts out 22.5 V and can supply a maximum current of 3.00 A. Find the maximum input current if the input voltage is 240 V.
A power plant produces a voltage of 6.0 kV and 150 A. The voltage is stepped up to 250 kV by a transformer before it is transmitted to a substation. What is the current in the transmission line from the plant to the substation?
Suppose a large power plant generates electricity at 12.0 kV. Its old transformer once converted this voltage to 325 kV. The secondary coil of this transformer is being replaced so that its output can be 755 kV for more efficient cross-country transmission on upgraded transmission lines. V1= 325 kV V,= 755 kV (a) If the overall power output is 1000.0 MW and line resistance is 2.00 N, what was the power loss, in watts, in the old power lines which left the plant? Ploss,1 = b) If the overall power output is 1000.0 MW and line resistance is 2.00 Q, what is the power loss, in watts, in the new power lines which leave the plant? Ploss,2=
A typical wall outlet voltage in the United States is 120 volts. Personal MP3 players require much smaller voltages, typically 302.1 mV. If the number of turns in the primary coil is 35753575, calculate the number of turns NS on the secondary coil of the adapter transformer.
A transformer on a pole near a factory steps the voltage down from 3,600 V (rms) to 120 V (rms). The transformer is to deliver 1960 kW to the factory at 88% efficiency. (a) Find the power delivered to the primary. kW (b) Find the current in the primary. A (c) Find the current in the secondary. Need Help? Read It
You decide to “go green" and use an exercise bike to power your home appliances. Assume that your exercise bike is rigged to generate electrical power with 60% efficiency. In other words, only 6/10 of the power you develop can be used to store electrical energy for later use. Consider your 3500-Watt central AC unit. You need to run this unit for 4 hours each day during the summer. If you can develop a sustained power of 300 Watts on your exercise bike, how long would you have to work out just to keep the AC running on a summer day?
A transformer outside of a business steps the average voltage down from 3600 V to 120 V. The transformer delivers 1.50 × 106 W to the business at 82.0% efficiency. (Give answers to 3 sig.figs.) Find … (a) the power delivered to the primary, (b) the current in the primary, and (c) the current in the secondary.
The primary circuit in a transformer carries a current of 4.0 A at 120 V. The secondary circuit of a transformer carries 1.0 A of current. If only 90.0 % of the power is transmitted from the primary circuit to the secondary circuit, what is the voltage of the secondary circuit?