How does the force between parallel conductors used in defining the ampere (current SI unit)?
How does the force between parallel conductors used in defining the ampere (current SI unit)?
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1 Answer
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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 when two infinitely long, straight, parallel conductors are placed one meter apart in vacuum.
Similar Questions for you
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
The exact formula for the magnetic force per unit length between two parallel current-carrying conductors:
For more information, check: Force between parallel conductors
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