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9Sci CH23

9th Science CH23 Electronics and Computers

amplification the process of increasing the strength of an electrical signal
cathode-ray tube (CRT) sealed glass vacuum tube that uses electrons and fluorescent material to produce images in a screen
computer virus type of program designed to infect a computer, erase data, scramble other programs, or fill up so much memory that the system is harmed
diode a type of rectifier that allows electric current to flow in only one direction
integrated circuit a thin slice of silicon, often less than 1 cm on a side, which can contain thousands of resistors, diodes, and transistors; used in computers and electronic equipment
microprocessor a computer’s “brain”; it receives input and tells the computer how to respond
RAM Random-Access Memory in a computer; temporary memory is lost when the computer is turned off
rectifier any device that converts alternating current (AC) into direct current (DC)
ROM Read-Only Memory in a computer; it is permanent memory stored inside the computer, even when the power is turned off
transistor a semiconductor that amplifies or strengthens an electrical signal or acts as a tiny on-off switch