WorksheetsCourse 2 Topic 10 Information Technologies
Total questions: 25
Worksheet time: 13mins
With the large number of devices communicating wirelessly these days, how are the signals kept from going to the wrong place?
Each device has an internal code that has to match the code of an incoming transmission.
Different devices operate on different wavelengths of the electromagnetic spectrum.
The signals are routed through the wireless network like a post office sorts mail by zip code.
Devices with larger antennae use higher frequencies and devices with smaller antennae use lower frequencies to communicate.
Which type of signal would be more difficult to erase the noise from?
Analog, because it is a continuous signal and the noise is blended in.
Digital, because it is a continuous signal and the noise is blended in.
Both, because analog and digital signals are both continuous and the noise is blended in.
This is all so confusing!!
Morse code is an example of which type of signal?
analog
digital
noise
QED
What does the bandwidth describe?
The amount of information that can be transmitted.
The location of the signal on the electromagnetic spectrum.
The amount of noise interference.
The width of the wire used to send electronic signals.
An electric circuit in which all of the parts are connected one after another along one path.
Parallel circuit
Series Circuit
Ohm's Law
Encryption
Resistance in a circuit is equal to voltage divided by current.
Parallel circuit
Series Circuit
Ohm's Law
Sampling Rate
A complete, unbroken path through which electric charges can flow.
resistance
electrical circuit
voltage
wave pulse
The measurement of how difficult it is for charges to flow through an object.
voltage
wave pulse
resistance
Hertz
The difference in electrical potential energy per charge between two places in a circuit.
resistance
wave pulse
voltage
pixels
A surge of energy that travels through an electric circuit when it is closed.
wave pulse
electronic signal
electromagnetic signal
digital signal
Information that is sent as a pattern in a controlled flow of current through a circuit .
wave pulse
electronic signal
electromagnetic signal
analog signal
digital signal
Information that is sent as a pattern of waves, such as visible light, microwaves and radio waves.
wave pulse
electronic signal
electromagnetic signal
electronic signal
A signal that allows for a record of numerical values of an action at a set of continuous time intervals.
digital signal
analog signal
electronic signal
electromagnetic signal
A signal that allows for a record of some kind of action.
digital signal
analog signal
electronic signal
electromagnetic signal
A small, uniform shape that when combined together, make a larger image.
digital signal
analog signal
pixel
wave pulse
Computer and telecommunication hardware and software that store, transmit, receive, and manipulate information.
Information Technology
Network System
Router
Bandwidth
Random signals from the environment that can alter the output of a signal.
encryption
wave pulses
noise
pixels
The amount of information that can be transmitted in bits per second.
bytes
pixel
voltage
bandwidth
Computers and related devices, such as keyboards, monitors and speakers.
Hardware
Software
Network Systems
Multimedia
The use of systems for storing, retrieving and sending information.
Hardware
Software
Multimedia
Information Technology
Programs which enable users to write papers, browse the Internet, download music and play games are examples of......
hardware
software
network systems
router
Graphics, text, video, sound and animation are examples of.....
software
multimedia
hardware
operating systems
This allows people to share information while working on different computers in different locations.
a router
network systems
websites
hardware
A massive network, or bank of computer servers running software to coordinate their collective use. This is how the "cloud" operates.
world wide web
bandwidth
server farm
Netflix
Process of converting readable data into unreadable characters to prevent unauthorized access.
firewall
passwords
encryption
server farm
