Engineering Studies Preliminary Course Quiz

What is the unit for current flow in a conductor?

• Volt

• Ohm

• Ampere

• Watt

What does amplification refer to in the context of signals?

• A decrease in the energy of a signal

• An increase in the energy of a signal

• The unit for current flow in a conductor

• A coding scheme for alphanumeric characters

Which modulation scheme contains information in the instantaneous variations in the amplitude of a modulated carrier wave?

• Frequency modulation

• Phase modulation

• Amplitude modulation

• Pulse modulation

What is an analogue signal?

• A signal that is continuous in both amplitude and time

• A signal that is discrete in both amplitude and time

• A signal that is continuous in amplitude but discrete in time

• A signal that is discrete in amplitude but continuous in time

What does ASCII code represent?

• A coding scheme for alphanumeric and control characters

• A modulation scheme for digital signals

• A decrease in the intensity of light

• The range of frequencies in a signal

What is attenuation in the context of signals?

• An increase in the intensity of light

• A decrease in the intensity of light

• The range of frequencies in a signal

• The unit for current flow in a conductor

What is the range of frequencies that can be propagated by a channel called?

• Baseband

• Bandwidth

• Amplitude

• Attenuation

What are binary signals?

What is binary technology?

• A method of storing electric charge

• A measure of the amount of information that can be sent over a communications channel

• Where the numbers used are represented with two digits only, 1 and 0

• A device to detect the presence of radio frequency (RF) energy

What does broad-banding refer to?

• The ability to store electric charge

• Being able to operate over a wide range of frequencies

• A periodic signal at some desired transmission frequency

• A link in a telecommunications network