2022 · Q36
Which one of the following is a semi-conductor device that is used to increase the power of the incoming signals by preserving the shape of the original signal?
general-sciencephysics-light-electricity
- ARegister
- BTransistor
- CFlip-flop
- DDiode
Explanation
A transistor is a semiconductor device (made of silicon/germanium) that amplifies weak incoming electrical signals, increasing their power while preserving the original waveform's shape. A register (option A) is a small storage location in a CPU; a flip-flop (option C) is a bistable circuit for storing one bit; a diode (option D) allows current in only one direction and is used for rectification, not amplification. Hence option B.