AI-generated practice question — model-generated for extra practice, not a previous-year CBSE board question.
By Newton's third law, the conductor exerts an equal and opposite force on the magnet. This mutual force between current and magnet is the principle behind the electric motor.
The examiner expects two points in one line: (1) Newton's third law → equal and opposite reaction force on the magnet, and (2) linking this interaction to the electric motor. Ampere's suggestion (from the passage) directly states the magnet exerts equal and opposite force on the conductor — so the reverse is the conductor on the magnet. Keep it concise for 1 mark.