What is the primary goal of telecommunications?

• To improve battery life

• To create new devices

• To send signals and data from one device to another

• To entertain users

What is required for electricity to flow between two points?

• A difference in potential (voltage)

• A constant temperature

• A magnetic field

• Identical charges at both points

Which of the following is NOT a basic term related to electricity?

• Amps

• Pixels

• Volts

• Watts

What is the role of resistance in an electrical circuit?

• To increase voltage

• To decrease current

• To oppose the flow of electricity

• To store energy

In the context of analog signals, what does amplitude represent?

• The direction of the wave

• The color of the wave

• The height or strength of the wave

• The speed of the wave

How is frequency measured?

• In cycles per second or Hertz

• In meters

• In decibels

• In volts

What happens to the wavelength as the frequency of a wave increases?

• The wavelength becomes infinite

• The wavelength remains the same

• The wavelength decreases

• The wavelength increases

What is the main difference between AM and FM radio?

• AM modulates frequency, FM modulates amplitude

• AM is for music, FM is for talk shows

• AM is digital, FM is analog

• AM modulates amplitude, FM modulates frequency

What does digital signal transmission rely on?

• Color codes

• Analog frequencies

• Binary values of 0 and 1

• Continuous waveforms

Which of the following devices primarily uses digital signals?

• Analog clock

• Smartphone

• Vinyl record player

• Traditional radio