What term describes a circuit designed to magnify power, current, or voltage?

What term describes a circuit designed to magnify power, current, or voltage?

• A. Antenna
• B. Amplifier
• C. Circuit diagrams
• D. Transistor

Answer: (B)

An amplifier is a circuit that increases the strength of a signal, boosting its voltage, current, or power. It takes a small input signal and, with a proper power supply, produces a larger output signal. This boosting ability is quantified by gain: voltage gain, current gain, or power gain. Amplifiers are built around active components like transistors or tubes and require an external power source to deliver the extra energy needed to raise the signal’s magnitude. Antenna is about converting electrical energy to or from electromagnetic waves, not about increasing signal strength. Circuit diagrams are drawings of circuits, used to plan and analyze wiring, not to amplify a signal. A transistor is a component that can function inside an amplifier or as a switch, but the term for a circuit designed specifically to magnify signals is an amplifier.

An amplifier is a circuit that increases the strength of a signal, boosting its voltage, current, or power. It takes a small input signal and, with a proper power supply, produces a larger output signal. This boosting ability is quantified by gain: voltage gain, current gain, or power gain. Amplifiers are built around active components like transistors or tubes and require an external power source to deliver the extra energy needed to raise the signal’s magnitude.

Antenna is about converting electrical energy to or from electromagnetic waves, not about increasing signal strength. Circuit diagrams are drawings of circuits, used to plan and analyze wiring, not to amplify a signal. A transistor is a component that can function inside an amplifier or as a switch, but the term for a circuit designed specifically to magnify signals is an amplifier.