What is the difference between a solenoid and a toroid in terms of magnetic field?
What is the difference between a solenoid and a toroid in terms of magnetic field?
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1 Answer
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When electric current passes through a long coil of wire, it generates a nearly uniform magnetic field inside it, it is the solenoid. Outside this solenoid, the magnetic field is weak and negligible. On the other hand, in a toroid, the magnetic field is completely confined within its core, which forms a closed loop. It is a solenoid bent into a circular shape (doughnut-shaped). Outside the toroid, there is essentially no magnetic field. By understanding this difference, the students can design electromagnetic devices more effectively. The toroids are useful in lowering electromagnetic interference.
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