What is Electronics? Unit Review

Match the following inventions with their functions based on your reading of page 15.

• Read and understand electronic signals

• Computer

• Determine the altitude, direction and speed of moving and fixed objects.

• Transistor

• Do a range of computing problems.

• Radio

• Transmit images and sound over wire circuits.

• Radar

• Replace the use of valves.

• Television

Match the following

• having a series of holes

• Peripheral

• an auxiliary device that works with a computer

• Perforated

• an original model used to test a circuit or a product

• Soldering

• convert an electrical signal into another code

• Decode

• the act of joining metallic parts

• Prototype

A cellular phone (or mobile phone) is designed to give the user freedom of ​ (a)   while using a telephone. It uses ​ (b)   to communicate between the phone and the ​ (c)   . The server area is divided into smaller areas called cells and an antenna is placed within each cell and connected by telephone ​ (d)   . These lines connect cellular phones to one another: a computer selects the antenna closest to the telephone when a call is made. If the phone moves from one serving ​ (e)   to another, the radio signal is transferred to the actual cell without interrupting the conversation.

• movement
• radio signals
• antenna
• lines
• cell

Mobile phones use radio signals to communicate.

• True

• False

The server area is divided into smaller areas called stations.

• True

• False

The antenna is the heart of the system.

• True

• False

Loudspeakers are controlled by the microprocessor.

• True

• False

The flash memory handles all the functions.

• True

• False