How does the force between parallel conductors used in defining the ampere (current SI unit)?

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    Answered by

    Anushree Tiwari

    3 weeks ago

    The "ampere" was defined based on the magnetic interaction. The scientific community used the magnetic force between two parallel current-carrying conductors placed at a distance. Below is the definition of 1 ampere, based on this concept.

    1 Ampere is the constant current that produces a magnetic force of exactly  2*10? 7? N/m, when two infinitely long, straight, parallel conductors are placed one meter apart in vacuum.

Similar Questions for you

P
Pallavi Arora

The direction of the net magnetic force is always perpendicular to the plane of current-carrying conductors. The direction of the magnetic force is determined through the right-hand rule. 

The right-hand thumb rule states that if you wrap a wire in a way that the thumb points towards the flow of current. Then your curled fingers represent the direction of the field lines of the magnetic field

C
Chandra Pruthi

The exact formula for the magnetic force per unit length between two parallel current-carrying conductors:

F l = ? 0 I1 I2 2? d For more information, check: Force between parallel conductors

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