Final answer:
Mica and disc capacitors are commonly used on circuit boards. Mica capacitors are known for precision and stability, while disc capacitors offer compact size and accuracy. Both types are integral in modern electronic devices for their advanced dielectric materials and high capacitance capabilities.
Step-by-step explanation:
Mica and disc capacitors are primarily used on circuit boards. These capacitors are found in various electronics and are known for their stability and accuracy. The term mica refers to a group of silicate minerals used as dielectric material in capacitors, offering high precision, reliability, and stability even under extreme conditions. Whereas disc capacitors, typically ceramic disc capacitors, are also widely used in electronic circuitry as their construction allows for a compact design and they provide a stable and accurate capacitance value. Modern capacitors, like these, use more advanced technology to achieve high capacitance in a compact form, which is why they are suitable for applications such as filtering static from radio reception and storage in various devices, including heart defibrillators. In contrast, power capacitors are used to balance the impedance in power lines as part of the RLC circuits, which are not typically related to mica or disc capacitors but more to high power applications.