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d. Effective value of voltage. 27. The diagram shows cables used in the transmission of electrical energy. High transmission cables voltages are used for the transmission. DO00 DO00 Why are high voltages used for the transmission of-electrical energy? power station a. Fear of high voltages stops people from interfering with the cables. b. Heat loss in the cables is smaller than if low voltages are used. c. High voltages increase the current in the cables. d. High voltages produce large magnetic fields, so less insulation is needed. 28. The ratio between the electr in the

d. Effective value of voltage. 27. The diagram shows cables used in the transmission of electrical energy. High transmission cables voltages are used for the transmission. DO00 DO00 Why are high voltages used for the transmission of-electrical energy? power station a. Fear of high voltages stops people from interfering with the cables. b. Heat loss in the cables is smaller than if low voltages are used. c. High voltages increase the current in the cables. d. High voltages produce large magnetic fields, so less insulation is needed. 28. The ratio between the electr in the

College Physics
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)...
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d. Effective value of voltage. transmission cables 27. The diagram shows cables used in the transmission of electrical energy. High voltages are used for the transmission. DOD0 DO00 Why are high voltages used for the transmission of-electrical energy? power station a. Fear of high voltages stops people from interfering with the cables. b. Heat loss in the cables is smaller than if low voltages are used. c. High voltages increase the current in the cables. d. High voltages produce large magnetic fields, so less insulation is needed. 28. The ratio between the electric energy in the secondary to that in the primary is called: a. The lost energy. b. The given energy. c. The efficiency of the transformer, d. The working strength of the transformer. e. The gained energy. 29. The diagram shows a simple d.c. electric motor which is rotating. Which change will make the motor rotate coil. more quickly? magnet magnet a. increasing the number of turns on the coil b. removing the magnets ecreversing the battery
Transcribed Image Text:d. Effective value of voltage. transmission cables 27. The diagram shows cables used in the transmission of electrical energy. High voltages are used for the transmission. DOD0 DO00 Why are high voltages used for the transmission of-electrical energy? power station a. Fear of high voltages stops people from interfering with the cables. b. Heat loss in the cables is smaller than if low voltages are used. c. High voltages increase the current in the cables. d. High voltages produce large magnetic fields, so less insulation is needed. 28. The ratio between the electric energy in the secondary to that in the primary is called: a. The lost energy. b. The given energy. c. The efficiency of the transformer, d. The working strength of the transformer. e. The gained energy. 29. The diagram shows a simple d.c. electric motor which is rotating. Which change will make the motor rotate coil. more quickly? magnet magnet a. increasing the number of turns on the coil b. removing the magnets ecreversing the battery
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