COMPUTER FUNDAMENTALS

COMPUTER ARCHITECTURE

INPUTOUTPUT DEVICES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of the following is an output device?
A
Buzzer
B
Photocell
C
Pressure sensor
D
Push button
Explanation: 

Detailed explanation-1: -Piezo elements have the useful property of being bidirectional; that is they can move when you apply electricity to them, but they can also generate electricity when you move them.

Detailed explanation-2: -Piezo buzzer The multi-resonator consists of transistors or integrated circuits. When the power supply is switched on (1.5 15V DC operating voltage), the multi-resonator oscillates and outputs 1.5 2.5kHz audio signal. The impedance matcher pushes the piezoelectric plate to generate sound.

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