Electronics: Components and Functions Flashcards
6 cards from real AFCT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Electronics: Components and Functions flashcards as text
Which electronic component is designed to store energy in an electric field?
Answer: Capacitor
A capacitor is a passive electronic component that stores electrical energy in an electrostatic field between two conductive plates separated by an insulator. This ability to store charge allows it to block DC current while allowing AC current to pass, among other functions.
What is the primary function of a transistor?
Answer: To amplify or switch electronic signals
A transistor is a semiconductor device that is a fundamental building block of modern electronics. It can be used to either amplify a weak electronic signal or to act as a fast-acting switch, turning a current on or off.
A diode is a component that primarily...
Answer: allows current to flow in only one direction.
A diode is a semiconductor device that allows electrical current to flow in only one direction. It has very low resistance to current in one direction (forward bias) and very high resistance in the other (reverse bias), effectively acting as a one-way valve for electricity.
Which component stores energy in a magnetic field when current passes through it?
Answer: Inductor
An inductor is a passive component, typically a coil of wire, that stores energy in a magnetic field created by the electric current flowing through it. Its primary property is to oppose any change in the current flowing through it.
What is the unit of measurement for electrical resistance?
Answer: Ohm
The Ohm, symbolized by the Greek letter omega (Ω), is the SI unit of electrical resistance. It is named after Georg Simon Ohm, who formulated Ohm's Law. Resistance measures the opposition to the flow of electric current.
What is the function of a transformer?
Answer: To increase or decrease AC voltage
A transformer is a device used to transfer electrical energy between two or more circuits through electromagnetic induction. It is most commonly used to increase ('step-up') or decrease ('step-down') AC voltages, which is crucial for efficient power transmission.