Question
Write a short note on the force acting on a current-carrying conductor placed in an external magnetic field.
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Answer
- Oersted discovered that a current-carrying conductor exerts a force on a compass needle (i.e., on small bar magnet) placed near it.
- Andre Ampere suggested that the reverse should also be true, i.e., a magnet must also exert an equal and opposite force on a current carrying conductor, experiments supported this.
- Thus, when a current-carrying conductor is placed in a magnetic field, it experiences a force, except, when it is placed parallel to the magnetic field.
- The force acting on a current-carrying conductor in magnetic field is due to the interaction between magnetic field (produced) due to the current-carrying conductor and the external magnetic field in which the conductor is placed.
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