Electromagnetic Waves & Metric System Quiz

A __________ is a piece of information that is communicated using the senses.

• signal
• wave
• noise
• warning

__________ is the unwanted modification of a signal.

• signal
• wave
• noise
• warning

True or False: An analog signal is one that changes continuously

• True
• False

True or False: Radio waves are an example of a digital signal.

• True
• False

True or False: Digital signals are more affected by noise than analog signals.

• True
• False

True or False: The more pixels a digital image consists of, the clearer the image.

• True
• False

Computers use a series of __________ numbers to encode information.

• even
• odd
• binary
• random

Which is the best model of an analog signal?

• a smooth wave
• a light switch going on and of
• a series of 1's and 0's
• a series of pulses

Which best compares the reliability of analog signals and digital signals?

• Only analog signals are reliable.
• Digital signals are more reliable than analog signals
• Analog signals are more reliable than digital signals.
• Both types of signals are equally reliable.

For which type(s) of signals does noise alter the original information?

• analog only
• digital only
• both analog and digital
• neither analog and digital