A capacitor that can't be adjusted in value is referred to as what?

A capacitor that cannot be adjusted in value is referred to as a fixed capacitor. This type of capacitor has a predetermined capacitance value that remains constant during operation. Fixed capacitors are widely used in electronic circuits for various applications, such as filtering, coupling, and decoupling signals, where a specific capacitance is essential for proper functioning.

Unlike variable capacitors, which allow for changes in capacitance value through mechanical adjustments, fixed capacitors are designed to provide stability in their capacitance. This makes them ideal for applications where reliability and predictable performance are necessary.

Electrolytic capacitors, while they can be fixed or variable, are typically polarized and have specific uses in circuits involving higher capacitance values. Non-polarized capacitors, on the other hand, can be used in AC applications but do not define whether a capacitance value is adjustable or fixed. Therefore, the characteristic of being unchangeable in value specifically identifies the capacitor as a fixed capacitor.