Chapter 18 Flashcards
The area covered by each microwave relay antenna mounted on towers is called a
Cell
A code is
The meaning of a single
When you talk on the telephone, the sound waves of your voice are converted to an electrical signal by a
Transducer
Television converts electromagnetic waves into
Image and sound
Which of the following is not a function of a computer?
Thinking
Optical fibers
Carry signals that are pulses of light and are smaller and lighter than wire cables
Computers process binary data in groups of
Eight bits
A computer keyboard is an example of a
Input device
When a computer is first turned on, the first program executed by the computer is the
Operating system
A digital signal is
All of these
A computer monitor is an example of a
Output device
Morse code was developed for
Sending information by telegraph
The binary number system is associated with
Digital signals
By the year 2009, all television signals will be broadcast
Digitally
Which of the following is not a computer input device?
A printer
A cordless phone is a
Transceiver
What is a satellite footprint?
The geographic region covered by a communication satellite
In a computer the operating system is stored on
The hard drive
In 1989, the web was
Used mostly as a resource for scientific information
Microwaves are a form of
Electromagnetic waves
One disadvantage of analog signals is that they
Get distorted after several transmissions
A cathode-ray tube in a black and white tv makes a beam of electrons from
A negatively charged cathode
To send sound using electricity the first step is to
Convert the sound into electric current
Language is a example of a
Code
