Bundle: Physics for Scientists and Engineers with Modern Physics, Loose-leaf Version, 9th + WebAssign Printed Access Card, Multi-Term
9th Edition
ISBN: 9781305932302
Author: Raymond A. Serway, John W. Jewett
Publisher: Cengage Learning
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Chapter 27, Problem 6OQ
To determine
The wire which has the smallest resistance.
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A cylindrical wire has a radius r and length ℓ. If both r and ℓ are doubled, does the resistance of the wire (a) increase, (b) decrease, or (c) remain the same?
A length of copper wire has a resistance 24 Ω. The wire is cut into three pieces of equal length, which are then connected as parallel lengths between points A and B. What resistance will this new “wire” of length L0 3 have between points A and B? Answer in units of Ω.
A given copper wire has a resistance of 5.20 Q at 20.0°C while a tungsten wire of the same diameter has a resistance of 4.63 Q at
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Chapter 27 Solutions
Bundle: Physics for Scientists and Engineers with Modern Physics, Loose-leaf Version, 9th + WebAssign Printed Access Card, Multi-Term
Ch. 27.1 - Consider positive and negative charges of equal...Ch. 27.2 - Prob. 27.2QQCh. 27.2 - Prob. 27.3QQCh. 27.4 - When does an incandescent lightbulb carry more...Ch. 27.6 - Prob. 27.5QQCh. 27 - Prob. 1OQCh. 27 - Prob. 2OQCh. 27 - Prob. 3OQCh. 27 - Prob. 4OQCh. 27 - Prob. 5OQ
Ch. 27 - Prob. 6OQCh. 27 - Prob. 7OQCh. 27 - Prob. 8OQCh. 27 - Prob. 9OQCh. 27 - Prob. 10OQCh. 27 - Prob. 11OQCh. 27 - Prob. 12OQCh. 27 - Prob. 13OQCh. 27 - Prob. 1CQCh. 27 - Prob. 2CQCh. 27 - Prob. 3CQCh. 27 - Prob. 4CQCh. 27 - Prob. 5CQCh. 27 - Prob. 6CQCh. 27 - Prob. 7CQCh. 27 - Prob. 8CQCh. 27 - Prob. 1PCh. 27 - A small sphere that carries a charge q is whirled...Ch. 27 - Prob. 3PCh. 27 - Prob. 4PCh. 27 - Prob. 5PCh. 27 - Prob. 6PCh. 27 - Prob. 7PCh. 27 - Prob. 8PCh. 27 - The quantity of charge q (in coulombs) that has...Ch. 27 - Prob. 10PCh. 27 - Prob. 11PCh. 27 - Prob. 12PCh. 27 - Prob. 13PCh. 27 - Prob. 14PCh. 27 - A wire 50.0 m long and 2.00 mm in diameter is...Ch. 27 - A 0.900-V potential difference is maintained...Ch. 27 - Prob. 17PCh. 27 - Prob. 18PCh. 27 - Prob. 19PCh. 27 - Prob. 20PCh. 27 - Prob. 21PCh. 27 - Prob. 22PCh. 27 - Prob. 23PCh. 27 - Prob. 24PCh. 27 - Prob. 25PCh. 27 - Prob. 26PCh. 27 - Prob. 27PCh. 27 - While taking photographs in Death Valley on a day...Ch. 27 - Prob. 29PCh. 27 - Prob. 30PCh. 27 - Prob. 31PCh. 27 - Prob. 32PCh. 27 - Prob. 33PCh. 27 - Prob. 34PCh. 27 - At what temperature will aluminum have a...Ch. 27 - Assume that global lightning on the Earth...Ch. 27 - Prob. 37PCh. 27 - Prob. 38PCh. 27 - Prob. 39PCh. 27 - The potential difference across a resting neuron...Ch. 27 - Prob. 41PCh. 27 - Prob. 42PCh. 27 - Prob. 43PCh. 27 - Prob. 44PCh. 27 - Prob. 45PCh. 27 - Prob. 46PCh. 27 - Prob. 47PCh. 27 - Prob. 48PCh. 27 - Prob. 49PCh. 27 - Prob. 50PCh. 27 - Prob. 51PCh. 27 - Prob. 52PCh. 27 - Prob. 53PCh. 27 - Prob. 54PCh. 27 - Prob. 55PCh. 27 - Prob. 56PCh. 27 - Prob. 57APCh. 27 - Prob. 58APCh. 27 - Prob. 59APCh. 27 - Prob. 60APCh. 27 - Prob. 61APCh. 27 - Prob. 62APCh. 27 - Prob. 63APCh. 27 - Review. An office worker uses an immersion heater...Ch. 27 - Prob. 65APCh. 27 - Prob. 66APCh. 27 - Prob. 67APCh. 27 - Prob. 68APCh. 27 - Prob. 69APCh. 27 - Prob. 70APCh. 27 - Prob. 71APCh. 27 - Prob. 72APCh. 27 - Prob. 73APCh. 27 - Prob. 74APCh. 27 - Prob. 75APCh. 27 - Prob. 76APCh. 27 - Review. A parallel-plate capacitor consists of...Ch. 27 - The dielectric material between the plates of a...Ch. 27 - Prob. 79APCh. 27 - Prob. 80APCh. 27 - Prob. 81APCh. 27 - Prob. 82CPCh. 27 - Prob. 83CPCh. 27 - Material with uniform resistivity is formed into...Ch. 27 - Prob. 85CP
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- Suppose you wish to fabricate a uniform wire from 2.40 g of copper. The wire is to have a resistance of R = 0.700 Ω and all the copper is to be used. (a) What must be the length of this wire? m(b) What must be the diameter of this wire?arrow_forwardSuppose you wish to fabricate a uniform wire from 1.10 g of copper. The wire is to have a resistance of R = 0.540 Ω and all the copper is to be used. (a) What must be the length of this wire? m(b) What must be the diameter of this wire? µmarrow_forwardYou have an aluminum bar of dimensions 2.0 cm × 5.0 cm × 10 cm. You want to insert it into an electric circuit so that it will have the smallest possible resistance. Which pair of opposite faces should you connect to the circuit?arrow_forward
- Two metallic wires made from copper have same length but the radius of wire 1 is half of that of wire 2. The resistance of wire 1 is R. If both the wires are joined together in series, the total resistance becomes: A) 2R B) R/2 C) 5R/4 D) 3R/4arrow_forwardV-I Curve for two conductors A and B is shown. Which of the two conductors will have more resistance : A 60 30% (В) В (D) None of these (A) A (C) Both have same resistancearrow_forwardWire 1 has a length L and a circular cross section of diameter D. Wire 2 is constructed fromthe same material as wire 1 and has the same shape, but its length is 2L and its diameter is2D. Is the resistance of wire 2 the same as that of wire 1, twice that of wire 1, or half that ofwire 1?arrow_forward
- You have four homogeneous wires made of the same material. Each wire has a diameter of 3 mm and a length of 0.9 m. When the four wires are connected in series, their combination has an equivalent resistance Req. You want to obtain this same equivalent resistance with a single wire made of the same material, but whose diameter is 1 mm. About how long should this single wire be? Group of answer choices 2.5 m The answer is not listed among the given choices 0.4 m 1.2 m 0.8 marrow_forwardNine copper wires of length l and diameter d are connected in parallel to form a single composite conductor of resistance R.What must be the diameter D of a single copper wire of length l if it is to have the same resistance?arrow_forwardNine identical wires, each of diameter d and length L, are connected in series. The resistance of the other wire (length L) is the same resistance as the equivalent combination of 9 wire. The diameter of this wire is: 18d d/18 d/3 2d 9d d/81 none of the above d/2 3d 6/parrow_forward
- Two conducting wires X and Y are made of copper-nickel and have equal lengths, but the resistance of wire X is three times greater than that of wire Y’s. What is the ratio of the radius of wire X to that of Y’s? Choices: √3:1, 1:1, 1:√3, 1:3,arrow_forwardAn aluminum wire has a diameter of 2.59 mm. How many meters of this wire is needed to give a resistance of 2.0 2? p of aluminum is 2.8 x 10-8 22-m. O 380 m O 1.75 km 190 m Not any of the choices listed O 0.35 kmarrow_forwardA certain wire has a resistance of 140 Ω. What is the resistance of a second wire, made of the same material, that is 1/4 as long and has 1/4 the diameter?arrow_forward
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