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When a current is passed through a long coil, a magnetic field is produced in and around it. The field lines are similar to those of a bar magnet. If the right hand is wrapped around an imaginary solenoid in the direction of the current, the thumb points to the North pole.
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Key terms in this lesson
- field line
- A line showing the direction of the force that would act on a small test mass or charge placed at that point in a field.
- magnetic field
- A region of space in which a moving charge, current-carrying conductor or magnetic material experiences a force.
More in Electromagnetic Induction
- Electromagnetic Induction
- Energy Transfer
- A Dynamo
- Lenz's Law
- Faraday's Law of Electromagnetic Induction
- The Alternating Current Generator
- Power Station Alternators
- Back e.m.f.
All 12 lessons in Electromagnetic Induction · All OCR A-level Physics topics