Question
What is an advantage of using a ferrite core toroidal inductor?
Answer Options
- A) Large values of inductance may be obtained
- B) The magnetic properties of the core may be optimized for a specific range of frequencies
- C) Most of the magnetic field is contained in the core
- D) All these choices are correct
Correct Answer: D
Explanation
Ferrite core toroidal inductors are widely favored in amateur radio due to their multiple advantages in circuit construction. Their high permeability allows large values of inductance to be obtained in a small physical space, and the use of specific ferrite ‘mixes’ allows the core to be optimized for a specific range of frequencies.
Furthermore, the toroidal shape (a doughnut shape) is a closed magnetic loop, meaning most of the magnetic field is contained in the core. This containment greatly reduces unwanted magnetic coupling to adjacent components, which helps prevent stray magnetic interference. Since all three benefits are realized, all these choices are correct.
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