Definition of unit of electric current

In summary, the unit of electric current is the ampere (A), which is defined as the amount of electric charge flowing through a surface in one second. The ampere is defined as the constant current that, if maintained in two straight parallel conductors of infinite length, of negligible circular cross-section, and placed one meter apart in a vacuum, would produce between these conductors a force equal to 2 x 10^-7 newton per meter of length. It is one of the seven base units in the SI system and is used to measure the flow of electric current in an electrical circuit. The ampere is related to other electrical units through the definition of electric current, which is the flow of electric charge. One ampere is
  • #1
Quantumkid
4
0
The ampere is that constant current which , if maintained in two straight parallel
conductors of infinite length, of negligible
circular cross-section, and placed 1 metre apart in vacuum, would produce between
these conductors a force equal to 2 × 10 ^{–7} Newton per metre of length.

What is meant by orange colored text??
 
Chemistry news on Phys.org
  • #2
Yes - and your question is ?
 
  • #3
It means that one considers the limit that the wires are infinitely thin.
 

1. What is the definition of unit of electric current?

The unit of electric current is the ampere (A), which is defined as the amount of electric charge flowing through a surface in one second.

2. How is the ampere defined?

The ampere is defined as the constant current that, if maintained in two straight parallel conductors of infinite length, of negligible circular cross-section, and placed one meter apart in a vacuum, would produce between these conductors a force equal to 2 x 10^-7 newton per meter of length.

3. Is the ampere a base unit in the International System of Units (SI)?

Yes, the ampere is one of the seven base units in the SI system and is used to measure the flow of electric current in an electrical circuit.

4. How is the ampere related to other electrical units?

The ampere is related to other electrical units through the definition of electric current, which is the flow of electric charge. One ampere is equal to one coulomb of electric charge flowing per second.

5. Can the ampere be used to measure both direct and alternating currents?

Yes, the ampere can be used to measure both direct and alternating currents, as it is a fundamental unit of electric current and is not dependent on the direction of flow.

Similar threads

I Is the new Ampère exactly the same as the old Ampère?
    • Classical Physics
Replies
3
Views
720
B Vacuum permittivty with alternative Standard-Unit for meters
    • Classical Physics
Replies
3
Views
546
How do we measure the units in physics?
    • Other Physics Topics
Replies
6
Views
2K
Pre 2019 definitions for an Ampere, how is this useful in practice?
    • Electromagnetism
Replies
10
Views
977
Arbitrariness of the surface involved in the displacement current
    • Electromagnetism
Replies
2
Views
702
Transmission line: leakage current differential equation
    • Engineering and Comp Sci Homework Help
Replies
2
Views
1K
E-field generated by constant current in a circular loop
    • Introductory Physics Homework Help
Replies
12
Views
2K
Displacement current in coaxial cables
    • Electromagnetism
Replies
7
Views
4K
Long distance electrical transmission efficiency
    • Introductory Physics Homework Help
Replies
2
Views
736
I How Do Eddy Current Dampers Work in Space Applications?
    • Electromagnetism
Replies
4
Views
279

Hot Threads

Recent Insights

Back
Top