O-LevelPhysicsMagnetism5054/12 · Oct/Nov 2014 · Q311 Mark

Two long, parallel conductors carrying current lie in a horizontal plane. The two conductors attract one another. The two currents must

Abe in the same direction.

Bbe in opposite directions.

Cbe parallel to the Earth's magnetic field.

Dbe at 90° to the Earth's magnetic field.

✓ Correct answer

A: be in the same direction.

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