[Answered] What is the resistance of a wire made of a material with a resistivity of 3.2 10-8 W m if its ...

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TVarnum

Hero Member
Posts: 548

on: Jul 28, 2018

What is the resistance of a wire made of a material with a resistivity of 3.2 10-8 W m if its length is 2.5 m and its diameter is 0.50 mm?
a. 0.16 W
b. 0.10 W
c. 1.28 W
d. 0.41 W
e. 0.81 W

Question 2

A wire (length = 2.0 m, diameter = 1.0 mm) has a resistance of 0.45W. What is the resistivity of the material used to make the wire?
a. 5.6 10-7 W m
b. 1.2 10-7 W m
c. 1.8 10-7 W m
d. 2.3 10-7 W m
e. 7.1 10-7 W m

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Mochi

Sr. Member
Posts: 300

Reply #1 on: Jul 28, 2018

Answer to Question 1

D

Answer to Question 2

C

TVarnum

Hero Member
Posts: 548

Reply #2 on: Jul 28, 2018

Mochi

Sr. Member
Posts: 300

Reply #3 on: Jul 28, 2018

You're welcome

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