COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 18, Problem 25QAP
To determine
The current in a high voltage transmission line.
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Chapter 18 Solutions
COLLEGE PHYSICS
Ch. 18 - Prob. 1QAPCh. 18 - Prob. 2QAPCh. 18 - Prob. 3QAPCh. 18 - Prob. 4QAPCh. 18 - Prob. 5QAPCh. 18 - Prob. 6QAPCh. 18 - Prob. 7QAPCh. 18 - Prob. 8QAPCh. 18 - Prob. 9QAPCh. 18 - Prob. 10QAP
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- 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?arrow_forwardAn overhead high voltage (4.0x105 V) power transmission line delivers electrical energy from a generating station to a substation at a rate of 1500 MW (1.5x109 W). Determine the resistance of and the current in the cables.arrow_forwardCan the terminal voltage of a battery ever exceed its emf?Explain.arrow_forward
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- Common household appliances are rated at 110 V, but power companies deliver voltage in the kilovolt range and then step the voltage down using transformers to 110 V to be used in homes. You will learn in later chapters that transformers consist of many turns of wire, which warm up as current flows through them, wasting some of the energy that is given off as heat. This sounds inefficient. Why do the power companies transport electric power using this method?arrow_forwardWhy is it economical to use extremely high voltages for the transmission of electrical power? High voltage and lower current implies that the electricity can travel longer distances. High voltage and lower current implies that the wires used can be thinner. High voltage and lower current implies that the power loss (ohmic heating) due to resistance is low as well. High voltage and lower current implies that the power plant can generate electricity more easily. High voltage and lower current implies that the resistance is higher, leading to a smaller power loss. High voltage and lower current implies that the amount of power generated per minute is very high, therefore rendering the method very efficientarrow_forwardAn electric device with effective power 530 mW is connected to an alternating source which gives effective voltage 50 V. What is the maximum value of electric current in that circuit? A. 106 mA В. 10.6 mA С. 1.5 mA D. 150 mA (E) 15 mAarrow_forward
- The following appliances are connected to a single 120 V, 15 A circuit in a kitchen: a 330 W blender, a 1000 W coffeepot, a 150 W coffee grinder, and a 750 W microwave oven. If these are all turned on at the same time, will they trip the circuit breaker?arrow_forwardin the circuit given below v What is the voltage value ? ia 33 - 2ia 5mA 1kN 3 kN. O A) 1.2 V O B) 2.4 V OC) 0.9 V O D) 3.6 V O E) 1.5 Varrow_forwardA man foolishly tries to fish a burning piece of bread from a toaster with a metal butter knife and comes into contact with 120-V ac. He does not even feel it since, luckily, he is wearing rubber-soled shoes. What is the minimum resistance of the path tire current follows through the person?arrow_forward
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