Which component would be suitable for filtering a signal's unwanted frequencies?

• A. Inductor
• B. Capacitor
• C. Both Inductor and Capacitor
• D. Resistor

Answer: (C)

A suitable component for filtering a signal's unwanted frequencies is both an inductor and a capacitor. Inductors and capacitors perform different functions in the filtering process, but both are essential in creating filters that can attenuate unwanted frequencies while allowing desired signals to pass.

Inductors store energy in a magnetic field when current flows through them and can impede high-frequency signals, making them effective for low-pass filters. Capacitors, on the other hand, store energy in an electric field and can block low-frequency signals, thus functioning well in high-pass filters. When used together in various configurations, such as in filter circuits, they can effectively eliminate unwanted frequencies by taking advantage of their complementary behaviors with respect to signal processing.

In different types of filter circuits, like band-pass and band-stop filters, both inductors and capacitors work in conjunction to determine the cut-off frequencies and the filtering characteristics of the circuit. Their collaborative use allows for more sophisticated filtering options which cannot be achieved with a single component like a resistor, which mainly dissipates power and doesn't primarily serve the filtering function in this context.

By employing both inductors and capacitors, you can design circuits that are effective in isolating or eliminating noise and interference in radio communications, making this option