In which unit are inductors rated?

In which unit are inductors rated?

• A. Farads
• B. Ohms
• C. Millihenries
• D. Hertz

Answer: (C)

Inductors are rated in henries (H), with millihenries (mH) being a common subunit used for many practical inductors. The henry measures an inductor's ability to store energy in a magnetic field when an electric current passes through it. Specifically, one henry is defined as the inductance that induces one volt (1 V) of electromotive force when the current through the inductor changes at the rate of one ampere per second (1 A/s). In practical applications, inductors with values in the millihenries range (1/1000th of a henry) are typical, especially in consumer electronics and other low-power circuits. This is significant for understanding how inductors function in various electronic circuits, including filters, oscillators, and energy storage devices. The other units listed—farads, ohms, and hertz—represent different electrical concepts. Farads measure capacitance, ohms measure resistance, and hertz measure frequency. Therefore, knowing that inductors are rated in millihenries highlights their role in managing the flow of alternating current and their significance in the behavior of electric circuits.

Inductors are rated in henries (H), with millihenries (mH) being a common subunit used for many practical inductors. The henry measures an inductor's ability to store energy in a magnetic field when an electric current passes through it. Specifically, one henry is defined as the inductance that induces one volt (1 V) of electromotive force when the current through the inductor changes at the rate of one ampere per second (1 A/s).

In practical applications, inductors with values in the millihenries range (1/1000th of a henry) are typical, especially in consumer electronics and other low-power circuits. This is significant for understanding how inductors function in various electronic circuits, including filters, oscillators, and energy storage devices.

The other units listed—farads, ohms, and hertz—represent different electrical concepts. Farads measure capacitance, ohms measure resistance, and hertz measure frequency. Therefore, knowing that inductors are rated in millihenries highlights their role in managing the flow of alternating current and their significance in the behavior of electric circuits.