Quiz on Electronic Communication

Which of the following best defines electronic communication?

• Transmission of information over optical media

• Analog processing of audio signals

• Transmission and reception of information using electronic signals

• Digital storage of data

What is the main advantage of digital communication systems over analog systems?

• Lower cost

• Higher noise immunity

• Reduced bandwidth requirements

• Simplified circuitry

The electromagnetic spectrum is divided into bands primarily based on:

• Modulation type

• Power level

• Frequency range

• Communication protocols

Which layer of the OSI model is responsible for signal modulation?

• Network layer

• Physical layer

• Data link layer

• Application layer

In communication systems, attenuation refers to:

• Increase in signal amplitude

• Reduction in signal strength over distance

• Noise addition to the signal

• Signal reflection at boundaries

In a capacitor, the reactance decreases as the:

• Capacitance decreases

• Voltage increases

• Frequency increases

• Temperature decreases

The purpose of a diode in a rectifier circuit is to:

• Store charge

• Allow current flow in one direction only

• Amplify the signal

• Regulate voltage

The gain of an operational amplifier in inverting mode is determined by:

• Supply voltage

• Load resistance

• Feedback resistor and input resistor ratio

• Input signal amplitude

In transistor operation, the region where both junctions are forward-biased is called the:

• Cutoff region

• Saturation region

• Active region

• Reverse region

The bandwidth of an RC low-pass filter is determined by:

• The load resistance

• The DC supply voltage

• The RC time constant

• The peak input voltage