College Physics:
11th Edition
ISBN: 9781305965515
Author: SERWAY, Raymond A.
Publisher: Brooks/Cole Pub Co
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 17.4, Problem 17.6QQ
Suppose an electrical wire is replaced with one having every linear dimension doubled (i.e., the length and radius have twice their original values). Does the wire now have (a) more resistance, (b) less resistance, or (c) the same resistance than before?
Expert Solution & Answer
Trending nowThis is a popular solution!
Students have asked these similar questions
Two resistances are connected (a) in series (b)
in parallel. The equivalent resistance in the two
cases are 9
respectively. The
and 2
resistances of the two resistors are
(α) 2 Ω and 7Ω
(c) 3 Ω and 9Ω
(b) 3 Ω and 6Ω
d) 4 Ω and 5 Ω
A cylindrical copper rod of length L and cross-sectional area A is reformed to three times its
original length with no change in volume. If the resistance between its ends was R before the
change, then its resistance after the change is:
a) 9R
b) 3R
c) 25R
d) 5R
e) 4R
f) R
a
b
e
f
Consider the electric circuit shown in the sketch, consisting of a 12.0-V battery and three capacitors connected partly inseries and partly in parallel. Find (a) the equivalent capacitance of this circuit and (b) the total energy stored in the circuit.
Chapter 17 Solutions
College Physics:
Ch. 17.1 - Consider positive and negative charges all moving...Ch. 17.2 - Suppose a current-carrying wire has a...Ch. 17.3 - Look at the four circuits shown in Figure 17.6 and...Ch. 17.4 - Prob. 17.4QQCh. 17.4 - All electric devices are required to have...Ch. 17.4 - Suppose an electrical wire is replaced with one...Ch. 17.6 - Prob. 17.7QQCh. 17.6 - For the two resistors shown in Figure 17.12, rank...Ch. 17.6 - Two resistors, A and B, are connected in a series...Ch. 17.6 - The diameter of wire A is greater than the...
Ch. 17 - We have seen that an electric field must exist...Ch. 17 - A 12-V battery is connected across a device with...Ch. 17 - Prob. 3CQCh. 17 - In an analogy between traffic flow and electrical...Ch. 17 - Two copper wires A and B have the same length and...Ch. 17 - Two lightbulbs are each connected to a voltage of...Ch. 17 - Newspaper articles often have statements such as...Ch. 17 - There is an old admonition given to experimenters...Ch. 17 - What could happen to the drift velocity of the...Ch. 17 - Power P0 = I0 V0 is delivered to a resistor of...Ch. 17 - When is more power delivered to a lightbulb,...Ch. 17 - Prob. 1PCh. 17 - A copper wire has a circular cross section with a...Ch. 17 - In the Bohr model of the hydrogen atom, an...Ch. 17 - A typical lightning bolt may last for 0.200 s and...Ch. 17 - Prob. 5PCh. 17 - Prob. 6PCh. 17 - A 2.0 102-km-long high-voltage transmission line...Ch. 17 - An aluminum wire having a cross-sectional area of...Ch. 17 - An iron wire has a cross-sectional area of 5.00 ...Ch. 17 - Prob. 10PCh. 17 - Prob. 11PCh. 17 - Germanium is a semiconducting metal with a...Ch. 17 - Prob. 13PCh. 17 - Prob. 14PCh. 17 - Nichrome wire of cross-sectional radius 0.791 mm...Ch. 17 - Prob. 16PCh. 17 - A potential difference of 12 V is found to produce...Ch. 17 - The current supplied by a battery in a portable...Ch. 17 - A wire 50.0 m long and 2.00 mm in diameter is...Ch. 17 - Prob. 20PCh. 17 - Prob. 21PCh. 17 - The human body can exhibit a wide range of...Ch. 17 - Starting from Ohms law, show that E = J, where E...Ch. 17 - Prob. 24PCh. 17 - Prob. 25PCh. 17 - Prob. 26PCh. 17 - Prob. 27PCh. 17 - At what temperature will aluminum have a...Ch. 17 - At 20.0C, the carbon resistor in an electric...Ch. 17 - Prob. 30PCh. 17 - Prob. 31PCh. 17 - An engineer needs a resistor with a zero overall...Ch. 17 - In one form of plethysmograph (a device for...Ch. 17 - Prob. 34PCh. 17 - A 5.00-V power supply provides a maximum current...Ch. 17 - If electrical energy costs 0.12 per kilowatt-hour,...Ch. 17 - Residential building codes typically require the...Ch. 17 - A portable coffee heater supplies a potential...Ch. 17 - The heating element of a coffeemaker operates at...Ch. 17 - A typical cell phone consumes an average of about...Ch. 17 - Lightbulb A is marked 25.0 W 120. V, and lightbulb...Ch. 17 - Prob. 42PCh. 17 - A copper cable is designed to carry a current of...Ch. 17 - Batteries are rated in terms of ampere-hours (A ...Ch. 17 - The potential difference across a resting neuron...Ch. 17 - The cost of electricity varies widely throughout...Ch. 17 - An electric utility company supplies a customers...Ch. 17 - An office worker uses an immersion heater to warm...Ch. 17 - Two wires A and B made of the same material and...Ch. 17 - Prob. 50PCh. 17 - If a battery is rated at 60.0 A h, how much total...Ch. 17 - A car owner forgets to turn off the headlights of...Ch. 17 - Prob. 53APCh. 17 - A given copper wire has a resistance of 5.00 at...Ch. 17 - Prob. 55APCh. 17 - Birds resting on high-voltage power lines are a...Ch. 17 - Prob. 58APCh. 17 - You are cooking breakfast for yourself and a...Ch. 17 - The current in a conductor varies in time as shown...Ch. 17 - A 120.-V motor has mechanical power output of 2.50...Ch. 17 - Prob. 62APCh. 17 - A length of metal wire has a radius of 5.00 103 m...Ch. 17 - In a certain stereo system, each speaker has a...Ch. 17 - A resistor is constructed by forming a material of...Ch. 17 - When a straight wire is heated, its resistance...Ch. 17 - An x-ray tube used for cancer therapy operates at...Ch. 17 - A man wishes to vacuum his car with a canister...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- How can three resistors of resistances 2 Ω, 3 Ω, and 6 Ω be connected to give a total resistance of (a) 4 Ω, (b) 1 Ω?arrow_forward(a) What is the resistance of a 1.00×102 -Ω , a 2.50-kΩ , and a 4.00-k Ω resistor connected in series? (b) In parallel?arrow_forwardTwo resistors, one having a resistance of 900 kΩ , are connected in series to produce a total resistance of 0.500 MΩ. (a) What is the value of the second resistance? (b) What is unreasonable about this result? (c) Which assumptions are unreasonable orinconsistent?arrow_forward
- A piece of copper wire of resistance R is cut into 10 equal lengths. These parts are connected in parallel. How does the joint resistance of the parallel combination compare with the original resistance of the single wire? If one lamp of a group of five identical lamps in series is removed, the voltage across the empty socket becomes equal to the line voltage, rather than remaining one-fifth of it. Why?arrow_forwardA lamp (R, = 151 Q), an electric heater (R, = 23 Q), and a fan (R, = 51 Q) are connected in parallel across a 120 V line. (a) What total current is supplied to the circuit? (b) What is the voltage across the fan? (c) What is the current in the lamp? (d) What power is expended in the heater?arrow_forwardA cylindrical copper rod of length L and cross-sectional area A is reformed to three times its original length with no change in volume. If the resistance between its ends was R before the change, then its resistance after the change is: a) 9R b) 3R c) 25R d) SR e) 4R a C d e O farrow_forward
- 50 2 50 Q 75 Q 75 0 105 Q +60V (a) Calculate the equivalent resistance of the circuit. (b) Calculate the current through (drawn from) the battery. (c) What is the total power dissipated by this circuit? (d) What is the magnitude of the voltage across the 105 Q resistor? (e) What is the voltage across one of the 75 Q resistors? (f) What is the current through one of the 75 Q resistors?arrow_forwardMay two conductors each of the same material and equal volume have different resistances? Explain and justify the answer.arrow_forwardTwo resistors, one having a resistance of 840 kn, are connected in series to produce a total resistance of 0.430 MQ. (a) What is the value of the second resistance (in ko)? ΚΩ (b) What is unreasonable about this result? (c) Which assumptions are unreasonable or inconsistent? liarrow_forward
- The parallel combination of five cells, each with electromotive force of 1.5 V and internal resistance of 0.5 Ω, is connected to an external resistance of 5.0 Ω. Find the (a) current through the external circuit, (b) terminal voltage of the battery, and (c) terminal voltage of a cell. (Can I get the answer in not more than 45 mins? or asap. Thank you!)arrow_forwardConsider n series-connected identical resistors of resistance R. Which of the following is true about their equivalent resistance? (A) The answer cannot be found on the other choices. B) Req=n/R; C) Req=R"; D) Req=Rn; E) Req = R/n;arrow_forwardTwo identical resistors are connected first in series and then in parallel. Which combination has a larger net resistance?\ (a) Two of the above (b) The pair in parallel (c) They have the same resistance (d) The pair in series Please provide a solution. Thank you.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
College PhysicsPhysicsISBN:9781305952300Author:Raymond A. Serway, Chris VuillePublisher:Cengage Learning
College PhysicsPhysicsISBN:9781285737027Author:Raymond A. Serway, Chris VuillePublisher:Cengage Learning
College Physics
Physics
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Cengage Learning
College Physics
Physics
ISBN:9781285737027
Author:Raymond A. Serway, Chris Vuille
Publisher:Cengage Learning
Ohm's law Explained; Author: ALL ABOUT ELECTRONICS;https://www.youtube.com/watch?v=PV8CMZZKrB4;License: Standard YouTube License, CC-BY