A device that magnifies power, current, or voltage is called what?

A device that magnifies power, current, or voltage is called what?

• A. Amplifier
• B. Transistor
• C. Antenna
• D. Watt-hours

Answer: (A)

An amplifier is a device that increases the strength of an electrical signal, boosting its voltage, current, or power. It takes a small input and produces a larger output, which is exactly what “magnifies” means in this context. A transistor is a component that can be used inside amplifiers to achieve this effect, but by itself it isn’t the named device that magnifies; an antenna handles radiation, not amplification; and watt-hours are units of energy, not a device. So the term describing a signal-boosting device is an amplifier.

An amplifier is a device that increases the strength of an electrical signal, boosting its voltage, current, or power. It takes a small input and produces a larger output, which is exactly what “magnifies” means in this context. A transistor is a component that can be used inside amplifiers to achieve this effect, but by itself it isn’t the named device that magnifies; an antenna handles radiation, not amplification; and watt-hours are units of energy, not a device. So the term describing a signal-boosting device is an amplifier.