Class 10 Exam > Class 10 Questions > Define resistivity. If resistivity of Cu is 1...
Start Learning for Free
Define resistivity. If resistivity of Cu is 1.67 x 10-8 Ωm, what does it signify?
Most Upvoted Answer
Define resistivity. If resistivity of Cu is 1.67 x 10-8 Ωm, what does ...
The electrical resistivity of copper is 1.68*10^-8 ohm*m. What is the conductance of a copper wire that is 10 m long and has a cross section 20 mm^2.
The conductance of a resistor is the inverse of its resistance and is expressed in the units Siemens where x Siemen is equivalent to (1/x) ohm.
In the problem the conductor is a copper wire that is 10 m long and it has a constant cross-sectional area of 20 mm^2.
The conductance C = (A/l)*(1/r), where A is the cross sectional area, l is the length and r is the resistivity. First convert all the values in terms of SI units. Length l = 10 m, area of cross section A = 20 mm^2 = 20*10^-6 m^2 and the resistivity is 1.68*10^-8 ohm*m
C = 20*10^-6/(10*1.68*10^-8)
=> (200/1.68) S
=> 119.04 S
The required conductance of the copper wire is 119.04 S.
The conductance of a resistor is the inverse of its resistance and is expressed in the units Siemens where x Siemen is equivalent to (1/x) ohm.
In the problem the conductor is a copper wire that is 10 m long and it has a constant cross-sectional area of 20 mm^2.
The conductance C = (A/l)*(1/r), where A is the cross sectional area, l is the length and r is the resistivity. First convert all the values in terms of SI units. Length l = 10 m, area of cross section A = 20 mm^2 = 20*10^-6 m^2 and the resistivity is 1.68*10^-8 ohm*m
C = 20*10^-6/(10*1.68*10^-8)
=> (200/1.68) S
=> 119.04 S
The required conductance of the copper wire is 119.04 S.
Community Answer
Define resistivity. If resistivity of Cu is 1.67 x 10-8 Ωm, what does ...
Definition of Resistivity
Resistivity is a fundamental property of materials that quantifies how strongly a material opposes the flow of electric current. It is defined as the resistance of a material with a uniform cross-section and a unit length. The unit of resistivity is ohm-meter (Ωm), and it is a crucial parameter in determining how efficiently a material conducts electricity.
Significance of Copper's Resistivity
The resistivity of copper (Cu) is measured at 1.67 x 10^-8 Ωm, which has several implications:
In summary, the resistivity of copper signifies its efficiency as a conductor, guiding its use in various electrical applications and impacting the performance of electrical systems.
Resistivity is a fundamental property of materials that quantifies how strongly a material opposes the flow of electric current. It is defined as the resistance of a material with a uniform cross-section and a unit length. The unit of resistivity is ohm-meter (Ωm), and it is a crucial parameter in determining how efficiently a material conducts electricity.
Significance of Copper's Resistivity
The resistivity of copper (Cu) is measured at 1.67 x 10^-8 Ωm, which has several implications:
- Excellent Conductor: The low resistivity value indicates that copper is one of the best electrical conductors available. This makes it ideal for electrical wiring and components.
- Material Selection: Engineers and designers choose copper for applications requiring efficient electrical conduction, such as power lines, circuit boards, and electronic devices.
- Temperature Dependence: Resistivity can change with temperature. For copper, resistivity typically increases with rising temperature, which is essential to consider in applications subjected to temperature variations.
- Comparison with Other Materials: Copper’s resistivity allows for comparison with other conductive materials. For example, it has lower resistivity than aluminum, making it preferable in many electrical applications.
- Impact on Performance: The resistivity influences the voltage drop across a conductor and affects the overall efficiency of electrical systems. Lower resistivity means less energy loss in the form of heat.
In summary, the resistivity of copper signifies its efficiency as a conductor, guiding its use in various electrical applications and impacting the performance of electrical systems.
Attention Class 10 Students!
To make sure you are not studying endlessly, EduRev has designed Class 10 study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Class 10.
|
Explore Courses for Class 10 exam
|
|
Top Courses for Class 10View all
Define resistivity. If resistivity of Cu is 1.67 x 10-8 Ωm, what does it signify?
Question Description
Define resistivity. If resistivity of Cu is 1.67 x 10-8 Ωm, what does it signify? for Class 10 2024 is part of Class 10 preparation. The Question and answers have been prepared according to the Class 10 exam syllabus. Information about Define resistivity. If resistivity of Cu is 1.67 x 10-8 Ωm, what does it signify? covers all topics & solutions for Class 10 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Define resistivity. If resistivity of Cu is 1.67 x 10-8 Ωm, what does it signify?.
Define resistivity. If resistivity of Cu is 1.67 x 10-8 Ωm, what does it signify? for Class 10 2024 is part of Class 10 preparation. The Question and answers have been prepared according to the Class 10 exam syllabus. Information about Define resistivity. If resistivity of Cu is 1.67 x 10-8 Ωm, what does it signify? covers all topics & solutions for Class 10 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Define resistivity. If resistivity of Cu is 1.67 x 10-8 Ωm, what does it signify?.
Solutions for Define resistivity. If resistivity of Cu is 1.67 x 10-8 Ωm, what does it signify? in English & in Hindi are available as part of our courses for Class 10.
Download more important topics, notes, lectures and mock test series for Class 10 Exam by signing up for free.
Here you can find the meaning of Define resistivity. If resistivity of Cu is 1.67 x 10-8 Ωm, what does it signify? defined & explained in the simplest way possible. Besides giving the explanation of
Define resistivity. If resistivity of Cu is 1.67 x 10-8 Ωm, what does it signify?, a detailed solution for Define resistivity. If resistivity of Cu is 1.67 x 10-8 Ωm, what does it signify? has been provided alongside types of Define resistivity. If resistivity of Cu is 1.67 x 10-8 Ωm, what does it signify? theory, EduRev gives you an
ample number of questions to practice Define resistivity. If resistivity of Cu is 1.67 x 10-8 Ωm, what does it signify? tests, examples and also practice Class 10 tests.
|
|
Explore Courses for Class 10 exam
|
|
Suggested Free Tests
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup