Physics for Scientists and Engineers
6th Edition
ISBN: 9781429281843
Author: Tipler
Publisher: MAC HIGHER
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Chapter 25, Problem 50P
To determine
The resistance between the conductors.
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Two conductors are made of the same material and have the same length. Conductor 1 is asolid wire of diameter 2.0 m. Conductor 2 is a hollow tube of outside diameter 3.0 m andinside diameter 2.0 m. The ratio of their resistance, R1/R2, is:
CHOICES:
1.5/4.3/2.3.8.
Which of the following wires has the least resistance? (Assume that they have the sameresistivity.)
Choices:
Thin, long, and hot.Thin, short, and hot.Thin, short, and cool.Thick, long, and hot.
A straight, cylindrical wire lying along the x axis has a length of 0.515 m and a diameter of 0.195 mm. It is made of a material described by Ohm's law with a resistivity of ? = 4.00 ✕ 10−8 Ω · m. Assume a potential of 4.00 V is maintained at the left end of the wire at x = 0. Also assume V = 0 at x = 0.515 m.
(a) Find the magnitude (in V/m) and direction of the electric field in the wire.
(b) Find the resistance of the wire (in Ω).
(c) Find the magnitude (in A) and direction of the electric current in the wire.
(d) Find the current density in the wire (in MA/m2).
See image for the full question.
Two conductors are made of the same material and have the same length. Conductor A is a solid wire of diameter 1.0 mm. Conductor B is a hollow tube of outside diameter 2.0 mm and inside diameter 1.0 mm. What is the resistance ratio RA/RB, measured between their ends?
Chapter 25 Solutions
Physics for Scientists and Engineers
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