5 The resistivity of Nichrome is about 100 times that of copper, a typical good conductor. a copper wire of the same radius would have a resistance per unit length of only 0.052 2/m, -m length of copper wire of the same radius would carry the same current (2.2 A) with an tage of only 0.115 V. its resistance to oxidation, Nichrome is often used for heating elements in toasters, irons, and aters. N Would replacing the Nichrome with copper wire of the same size result in a higher current rrent? er current same current current CE IT orked example above to help you solve this problem. O Calculate the resistance per unit length of a 44 gauge nichrome wire of radius 0.642 mm. 22/m If a potential difference of 11.6 V is maintained across a 1.00 m length of wire, what is the rent in the wire? A The wire is melted down and recast with triple its original length. Find the new resistance R a multiple of the old resistance Ro. Ro

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)...
icon
Related questions
Question
REMARKS The resistivity of Nichrome is about 100 times that of copper, a typical good conductor.
Therefore, a copper wire of the same radius would have a resistance per unit length of only 0.052 2/m,
and a 1.00-m length of copper wire of the same radius would carry the same current (2.2 A) with an
applied voltage of only 0.115 V.
Because of its resistance to oxidation, Nichrome is often used for heating elements in toasters, irons, and
electric heaters.
QUESTION Would replacing the Nichrome with copper wire of the same size result in a higher current
or lower current?
higher current
the same current
lower current
PRACTICE IT
Use the worked example above to help you solve this problem.
(a) Calculate the resistance per unit length of a 44 gauge nichrome wire of radius 0.642 mm.
22/m
(b) If a potential difference of 11.6 V is maintained across a 1.00 m length of wire, what is the
current in the wire?
A
(c) The wire is melted down and recast with triple its original length. Find the new resistance RN
as a multiple of the old resistance Ro.
Ro
Transcribed Image Text:REMARKS The resistivity of Nichrome is about 100 times that of copper, a typical good conductor. Therefore, a copper wire of the same radius would have a resistance per unit length of only 0.052 2/m, and a 1.00-m length of copper wire of the same radius would carry the same current (2.2 A) with an applied voltage of only 0.115 V. Because of its resistance to oxidation, Nichrome is often used for heating elements in toasters, irons, and electric heaters. QUESTION Would replacing the Nichrome with copper wire of the same size result in a higher current or lower current? higher current the same current lower current PRACTICE IT Use the worked example above to help you solve this problem. (a) Calculate the resistance per unit length of a 44 gauge nichrome wire of radius 0.642 mm. 22/m (b) If a potential difference of 11.6 V is maintained across a 1.00 m length of wire, what is the current in the wire? A (c) The wire is melted down and recast with triple its original length. Find the new resistance RN as a multiple of the old resistance Ro. Ro
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 4 steps with 3 images

Blurred answer
Knowledge Booster
Temperature variance of resistance
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
Recommended textbooks for you
College Physics
College Physics
Physics
ISBN:
9781305952300
Author:
Raymond A. Serway, Chris Vuille
Publisher:
Cengage Learning
University Physics (14th Edition)
University Physics (14th Edition)
Physics
ISBN:
9780133969290
Author:
Hugh D. Young, Roger A. Freedman
Publisher:
PEARSON
Introduction To Quantum Mechanics
Introduction To Quantum Mechanics
Physics
ISBN:
9781107189638
Author:
Griffiths, David J., Schroeter, Darrell F.
Publisher:
Cambridge University Press
Physics for Scientists and Engineers
Physics for Scientists and Engineers
Physics
ISBN:
9781337553278
Author:
Raymond A. Serway, John W. Jewett
Publisher:
Cengage Learning
Lecture- Tutorials for Introductory Astronomy
Lecture- Tutorials for Introductory Astronomy
Physics
ISBN:
9780321820464
Author:
Edward E. Prather, Tim P. Slater, Jeff P. Adams, Gina Brissenden
Publisher:
Addison-Wesley
College Physics: A Strategic Approach (4th Editio…
College Physics: A Strategic Approach (4th Editio…
Physics
ISBN:
9780134609034
Author:
Randall D. Knight (Professor Emeritus), Brian Jones, Stuart Field
Publisher:
PEARSON