variable inductor造句

Most radios use a variable capacitor; older automobile radios often used variable inductors.
Probably the most common type of variable inductor today is one with a moveable ferrite magnetic core, which can be slid or screwed in or out of the coil.
A "'phasor "'is a network of capacitors and variable inductors used to adjust the relative amplitude and phase of the current being distributed to each tower in a directional array.
It's difficult to find variable inductor in a sentence. 用variable inductor造句挺难的