What is a primary advantage of using a toroidal core instead of a solenoidal core in an inductor?
Toroidal cores confine most of the magnetic field within the core material✓Bonne réponse
Toroidal cores make it easier to couple the magnetic energy into other components
Toroidal cores exhibit greater hysteresis
Toroidal cores have lower Q characteristics
Explication
In a toroid the magnetic path closes on itself inside the core, so almost all the flux stays in the core and very little strays out to couple into neighboring components — the main reason toroids are preferred to solenoid-wound coils in crowded RF circuits. Easier magnetic coupling, greater hysteresis, and lower Q would all be drawbacks, and none of them describes a toroid.