Answered

Discover a wealth of knowledge at Westonci.ca, where experts provide answers to your most pressing questions. Get quick and reliable solutions to your questions from a community of experienced professionals on our platform. Get immediate and reliable solutions to your questions from a community of experienced professionals on our platform.

Which statement correctly describes the resistivity of a wire?
Resistivity depends on the material the wire is made from and has units of ohm-meters.
Resistivity depends on the current through the wire and has units of ohm-meters.
Resistivity depends on the current through the wire and has units of ohms.

Resistivity depends on the material the wire is made from and has units of ohms.

Sagot :

4321jill2

Answer:

Resistivity depends on the material the wire is made from and has units of ohm-meters.

Explanation:

hamzaahmeds

This question involves the concepts of resistivity, cross-sectional area, and resistance.

The statement which correctly describes the resistivity of a wire is, "Resistivity depends on the material the wire is made from and has units of ohm-meters".

The resistivity of a material is defined as the resistance per unit length per unit cross-sectional area of a material. It is found experimentally that the resistance of a conductor is directly proportional to its length ‘L’ and inversely proportional to its cross-sectional area ‘A’.

[tex]R\ \ \alpha\ \ \frac{L}{A}\\\\R=\rho\frac{L}{A}[/tex]

where ρ is a constant called ‘Resistivity’.

The S.I unit of resistivity is clear from the equation, which is equal to:

[tex]\Omega=\rho\frac{m}{m^2}\\\\\rho = \Omega.m[/tex]

So, the S.I unit of resistivity is Ohm-meters.

Learn more about resistivity here:

https://brainly.com/question/24139892?referrer=searchResults

View image hamzaahmeds
We appreciate your visit. Our platform is always here to offer accurate and reliable answers. Return anytime. Thanks for stopping by. We strive to provide the best answers for all your questions. See you again soon. Thank you for trusting Westonci.ca. Don't forget to revisit us for more accurate and insightful answers.