Radio Quiz

What unit is used to measure cycles per second in radio transmissions?

• Watt

• Volt

• Hertz

• Ohm

Which type of modulation creates 'side-band' frequencies at the upper and lower limits of a carrier wave?

• Phase modulation (PM)

• Pulse-code modulation (PCM)

• Frequency modulation (FM)

• Amplitude modulation (AM)

What is the speed of electromagnetic or radio waves?

• 299,792 kilometers per minute

• 299,792 kilometers per day

• 299,792 kilometers per second

• 299,792 kilometers per hour

What interacts with the receiving wires only if the wires are parallel to the magnetic field?

• Magnetic field

• Communication satellite

• Ionosphere

• Electric field

What is used to limit the frequency of waves received by antennas?

• Variable resistor and inductor

• Variable resistor and capacitor

• Variable capacitor and inductor

• Variable inductor and resistor

What process modifies information in amplitude, frequency, or duration for radio transmission?

• Rectification

• Amplification

• Oscillation

• Modulation

What is used to digitize and compress the analogue audio signal in digital broadcasting systems?

• WAV

• MP2

• MP4

• MP3

What does FM vary in the wave instead of its amplitude?

• Number of cycles

• Wavelength

• Amplitude

• Speed

What does the electric field activate when it comes into contact with the receiving wire?

• Electrical impulse

• Magnetic field

• Electromagnetic waves

• Communication satellite