Any active network device will do that. If this is a test question, answer "A repeater", as that is the only function of such device.
In truth, any device that takes a signal from one end and transmits it through another end will "boost" (amplify) the signal - or, rather, it will send out a "new" signal carrying the same information. Such devices include all types of hubs, switches and routers. Also, as mentioned above, repeaters.
If you meant "cable" as in "cable tv" - then it's the modem/router, usually the first device hooked up into the cable. As I've mentioned above, however, these devices take the signal in and put out a new signal on the other end, so they don't really "amplify it" as such (usually processing of the signal is involved).
Amplifiers are the device which are used to amplify a signal Multistage amplifier are use to amplify a signal into a desire level
Amplify is a verb. This device amplifies the signal from the microphone so that it can be heard.
to amplify a small signal to sufficient level,so that it can travel to a large distance from first stage till the last stage
It depends on how you bias the transistor. If you ground the emitter, which is very common, you will need to offset the input signal so you can amplify the full voltage swing.
Electronic component are those component which are used to make the electronic circuit it may be active or passive . some active components are - Diode ,FET,BJT,MOSFET, and HEMT etc. while passive component are those device which can not process/amplify signal like- resistor capacitor inductor etc.
ac and dc
they amplify the phone's incoming signal
to amplify the input pneumatic signal
I think Amplifier is use for direct signal or D.C signal & the main function of amplifier is to make that signal sharp(powerful) so that a microprocesser process it.
An amplifier that is designed to amplify the signal from an electric guitar and drive a speaker to convert that signal to sound.
The work of a transistor is to amplify the input signal to get high output value.
Transistor is an active element because it can amplify the signal applied.