(C) Magnetic force between two parallel current-carrying wires...


2. Two straight wires are in parallel and carry electric currents in opposite directions and with the same magnitude of 2.0 A. The distance between the two wires is 5.0 mm. One wire is infinitively long and the other wire is 0.30 m long. Is the magnetic force between the two wires repulsive or...



To investigate the magnetic force between two parallel current-carrying wires and determine the magnetic permeability of free space, µo.

Force between two parallel wires


This force between two current carrying wires gives rise to the fundamental definition of the Ampère: If two long parallel wires 1 m apart each carry a current of 1 A, then the force per unit length on each wire is 2 x 10- 7 N/m.

Forces between currents | Magnetic Force Between Wires


Note that two wires carrying current in the same direction attract each other, and they repel if the currents are opposite in direction. The calculation below applies only to long straight wires, but is at least useful for estimating forces in the ordinary circumstances of short wires.

Answer to Essential Question 19.4 : The velocity selector works...


19-5 The Magnetic Force on a Current-Carrying Wire. Starting with the magnetic force on a moving charge, , let’s derive the.

Current Electricity and Magnetism (2)


Current electricity and magnetism (2). Contents for this page. Related topics.

Rewrite in terms of force per unit length


19.8: Magnetic force between two parallel conductors.



19.8 MAGNETIC FORCE BETWEEN TWO PARALLEL CONDUCTORS How would you characterize the force between to parallel wires carrying current in the same direction? Define the SI units Ampere and Coulomb.



to an ordinary electromagnet, non-magnetic metals of good electrical conductivity wlll actually be repelled.

PhysicsLAB: Magnetism: Current-Carrying Wires


Forces between two current-carrying wires.

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