Physics for Scientists and Engineers
10th Edition
ISBN: 9781337553278
Author: Raymond A. Serway, John W. Jewett
Publisher: Cengage Learning
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Chapter 26.2, Problem 26.2QQ
To determine
Whether the resistance increases, decreases or remain same if the radius and length is doubled.
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Students have asked these similar questions
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,
Three cylindrical wires are made of the same material. Their lengths and radii arewire 1: length ℓ, radius 2rwire 2: length 2ℓ, radius rwire 3: length 3ℓ/2, radius r/2 Rank the wires according to their resistances, greatest first.
Five cylindrical wires are made of the same material. Their lengths and radii are
wire 1: length l, radius r
wire 2: length l/4, radius r/2
wire 3: length l/2, radius r/2
wire 4: length l, radius r/2
wire 5: length 5l, radius 2r
Rank the wires according to their resistances, least to greatest.
Group of answer choices
1, 3, 4, 2, 5
5, 4, 3, 2, 1
1, 2, 4, 3, 5
1, 2, 3, 4, 5
1 and 2 tie, then 5, 3, 4
Chapter 26 Solutions
Physics for Scientists and Engineers
Ch. 26.1 - Consider positive and negative charges of equal...Ch. 26.2 - Prob. 26.2QQCh. 26.2 - Prob. 26.3QQCh. 26.4 - When does an incandescent lightbulb carry more...Ch. 26 - Prob. 1PCh. 26 - A small sphere that carries a charge q is whirled...Ch. 26 - In the Bohr model of the hydrogen atom (which will...Ch. 26 - Prob. 4PCh. 26 - Prob. 5PCh. 26 - Figure P26.6 represents a section of a conductor...
Ch. 26 - The quantity of charge q (in coulombs) that has...Ch. 26 - A Van de Graaff generator (see Problem 24)...Ch. 26 - An electric current in a conductor varies with...Ch. 26 - Prob. 10PCh. 26 - An electric heater carries a current of 13.5 A...Ch. 26 - You are working at a company that manufactures...Ch. 26 - Prob. 13PCh. 26 - Prob. 14PCh. 26 - Prob. 15PCh. 26 - Prob. 16PCh. 26 - Prob. 17PCh. 26 - Prob. 18PCh. 26 - An aluminum wire with a diameter of 0.100 mm has a...Ch. 26 - Plethysmographs are devices used for measuring...Ch. 26 - At what temperature will aluminum have a...Ch. 26 - You are working in a laboratory that studies the...Ch. 26 - Assume that global lightning on the Earth...Ch. 26 - The Van de Graaff generator, diagrammed in Figure...Ch. 26 - A 100-W lightbulb connected to a 120-V source...Ch. 26 - The potential difference across a resting neuron...Ch. 26 - The cost of energy delivered to residences by...Ch. 26 - Residential building codes typically require the...Ch. 26 - Assuming the cost of energy from the electric...Ch. 26 - An 11.0-W energy-efficient fluorescent lightbulb...Ch. 26 - A 500-W heating coil designed to operate from 110...Ch. 26 - Why is the following situation impossible? A...Ch. 26 - Make an order-of-magnitude estimate of the cost of...Ch. 26 - Lightbulb A is marked 25 W 120 V, and lightbulb B...Ch. 26 - One wire in a high-voltage transmission line...Ch. 26 - You are working with an oceanographer who is...Ch. 26 - A charge Q is placed on a capacitor of capacitance...Ch. 26 - An experiment is conducted to measure the...Ch. 26 - Prob. 39APCh. 26 - Prob. 40APCh. 26 - Review. An office worker uses an immersion heater...Ch. 26 - The strain in a wire can be monitored and computed...Ch. 26 - A close analogy exists between the flow of energy...Ch. 26 - The dielectric material between the plates of a...Ch. 26 - Review. A parallel-plate capacitor consists of...Ch. 26 - Prob. 46APCh. 26 - Why is the following situation impossible? An...Ch. 26 - Prob. 48CPCh. 26 - A spherical shell with inner radius ra and outer...Ch. 26 - Material with uniform resistivity is formed into...
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- You are holding four wires made of the same material, but of varying sizes. Which of these wires would have the lowest resistance? A. 1 cm long, 1 cm radiusB. 2 cm long, 1 cm radiusC. 0.5 cm long, 1 cm radius D. 1 cm long, 0.5 cm radiusarrow_forwardTwo conductors are made of the same material and have the same length. Conductor A is a solid wire of diameter 1.9 mm. Conductor B is a hollow tube of outside diameter 2.9 mm and inside diameter 1.9 mm. What is the resistance ratio RA/RB, measured between their ends?arrow_forwardA 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?arrow_forward
- The copper wires have the same cross - sectional area but different lengths. Wire Y is twice as long as wire X. What is the ratio between the resistance of wire Y and wire X. A. 4:1B. 1:2C. 1:4D. 2:1arrow_forwardIf the length of a cylindrical conducting wire doubles and its radius also doubles, then the resistance of the wire __________. a. halves b. decreases by a factor of two c. doubles d. increases by a factor of four e. does not changearrow_forwardTwo wires, A and B, are made of the same metal and have equal length, but the resistance of wire B is four times the resistance of Wire A. How do their diameters compare? A) dA=4dB B) dA=2dB C) dA=0.5dB D) dA=0.5dB E) dA= 0.25dBarrow_forward
- To what temperature must you raise a gold wire (c = 0.0034), originally at 20.0°C, to double its resistance, neglecting any changes in dimensions? (You can assume that resistivity varies with temperature linearly) 608.24 °C 546.32 °C 283.16 °C 314.12 °Carrow_forwardA rod of semiconducting material of lenght L=3 m and cross-sectional area A=4.5 mm^2 lies along the x-axis between x=0 and x=L. The material obeys ohm's law, and resistivity varies along the rod according to p=p0 (1-(x^2/L^2)) where p0= 4.10^-4 ohm.m. The end of the rod x=0 is at a potential V0=30V greater than the x=L. A) what is the total resistance, in units of ohm, of the rod? B) what is the current, in units of miliamperes, in the rod? C) what is the electric potential, in units of Volt, in the rod at x=L/2? D) what is the electic-field magnitude E, in units of V/m, in the rod at x=L/2?arrow_forwarda wire of uniform cross-section has a resistance of R. What would be the resistance of a similar wire, made of the same material, but twice as long and of twice the diameter?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_forwardA copper wire of length 4.635 m and diameter 6.53 mm must be replaced by a new wire, also made of copper, but exactly 5 times longer. The resistance between the two ends must remain the same, so what diameter must be chosen for the new wire? Give your answer in mm.arrow_forwardConsider two coaxial conducting spheres of radii a and b = 2a. Filled with a conductive material with resistivity p = p0 (1 + r / a) between the radii (region a≤r≤b). Calculate the resistance between the spheres.arrow_forward
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