Two parallel conductors carrying electric currents in the same direction exert which type of magnetic force on each other?
Answer and explanation
Correct answer: C. Attractive force
- Step 1: According to Ampere's force law, parallel currents in the same direction produce magnetic fields that reinforce between them and oppose on the outside.
- Step 2: By the right-hand rule and Lorentz force law (), the magnetic force pulls each wire toward the other, resulting in an attractive force.
Answer
Attractive force.
Why not the others: 'Repulsive force' occurs when parallel currents flow in opposite directions; 'Zero net force' assumes no magnetic interaction; 'Pure twisting torque' occurs on closed loops, not parallel straight conductors.
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