IN77. If electric power is transmitted over long distances,the resistance of the wires becomes significant. Why?Which method of transmission would result in lessthey oftewires. WF684. (a)energy wasted-high current and low voltage or lowcurrent and high voltage? Explain your answer.resistaneVand b ipotentiaV is ap78. The ideal batteries haveemfs12 V and%3D6.0 V. What are (a) thecurrentcurrent, the dissipation rate in(b) resistor 1 (4.0 2) and (c)resistor 2 (8.0 2), and theenergy transfer rate in (d)battery 1 and (e) battery 2? Is energy being supplied orabsorbed by (f) battery 1 and (g) battery 2?79. Consider85. Aseries, aappliedcapacit4Fconstar10.0 225.0 Vcapacitthecircuitshown. Find (a)10.0 286. Ccthe currentthe20.0-2resistor and (b)potentialdifferencebetween pointsa and b.the20.0 275 00'S80. An automobile battery has an emf of 12.6 V and aninternal resistance of 0.0800 2. The headlights togetherpresent equivalent resistance 5.00 2 (assumed constant).What is the potential difference across the headlightbulbs (a) when they are the only load on the battery and(b) when the starter motor is operated, taking anadditional 35.0 A from the battery?87. TEthe methe ca81. Determine the current through each resistor shownresistabelow.mechathe baR 2 k2WhichEv, - 1.6 VE2= 1.4 VR2-1 k2 R- 1 k2R3 1 kf282. Switch S in is closed at time t= 0, to begin charging an initiallyunchargedcapacitance C=15.0 µF through acapacitorjo

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77. If electric power is transmitted over long distances, the resistance of the wires becomes significant. Why? Which method of transmission would result in less energy wasted-high current and low voltage or low current and high voltage? Explain your answer.

77. If electric power is transmitted over long distances, the resistance of the wires becomes significant. Why? Which method of transmission would result in less energy wasted-high current and low voltage or low current and high voltage? Explain your answer.

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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Question

IN
77. If electric power is transmitted over long distances,
the resistance of the wires becomes significant. Why?
Which method of transmission would result in less
they ofte
wires. W
F6
84. (a)
energy wasted-high current and low voltage or low
current and high voltage? Explain your answer.
resistane
V
and b i
potentia
V is ap
78. The ideal batteries have
emfs
12 V and
%3D
6.0 V. What are (a) the
current
current, the dissipation rate in
(b) resistor 1 (4.0 2) and (c)
resistor 2 (8.0 2), and the
energy transfer rate in (d)
battery 1 and (e) battery 2? Is energy being supplied or
absorbed by (f) battery 1 and (g) battery 2?
79. Consider
85. A
series, a
applied
capacit
4F
constar
10.0 2
25.0 V
capacit
the
circuit
shown. Find (a)
10.0 2
86. Cc
the current
the
20.0-2
resistor and (b)
potential
difference
between points
a and b.
the
20.0 2
75 00'S
80. An automobile battery has an emf of 12.6 V and an
internal resistance of 0.0800 2. The headlights together
present equivalent resistance 5.00 2 (assumed constant).
What is the potential difference across the headlight
bulbs (a) when they are the only load on the battery and
(b) when the starter motor is operated, taking an
additional 35.0 A from the battery?
87. TE
the me
the ca
81. Determine the current through each resistor shown
resista
below.
mecha
the ba
R 2 k2
Which
Ev, - 1.6 V
E2= 1.4 V
R2-1 k2 R- 1 k2
R3 1 kf2
82. Switch S in is closed at time t
= 0, to begin charging an initially
uncharged
capacitance C=15.0 µF through a
capacitor
jo

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