Four-connected adjustable capacitor

What is adjustable capacitance?

Adjustable capacitance makes these capacitors essential for fine-tuning electronic circuits. In electronic applications like radios and oscillators, their ability to adjust capacitance by changing surface area, plate spacing, or dielectric material allows for precise control.

What is a variable capacitor?

Learn about variable capacitors, essential parts of many electronic devices. Adjustable capacitance makes these capacitors essential for fine-tuning electronic circuits.

How do variable capacitors change capacitance?

Altering the physical parameters that dictate capacitance, such as the conductor plates' surface area (A), spacing between them (d), and permittivity (ε) of the dielectric material between them, can produce this shift in capacitance. The adjustment of the distance (d) between the plates is another feature of certain variable capacitors.

How do electronic components adjust capacitance?

In electronic applications like radios and oscillators, their ability to adjust capacitance by changing surface area, plate spacing, or dielectric material allows for precise control. Anyone interested in electronics must understand these components' operation and maintenance, whether they are electronically or mechanically adjusted.

What are fixed paper capacitors made of?

Several of these will be discussed in the following section. Fixed paper capacitors are made of layers of tinfoil. The dielectric is made of waxed paper. Wires extending from the ends connect to the foil plates. The assembly is tightly rolled into a cylinder and sealed with special compounds. Some capacitors are enclosed in plastic for rigidity.

What is a variable capacitor in a radio?

Typical variable capacitor consisting of a stator and rotor. When we adjust or turn the dial on a radio, we are actually adjusting a variable capacitor inside the radio. By changing the amount of capacitance inside the radio circuit, we are changing the radio frequency.