Radio Signals

• What can radio waves be caused by?

  Oscillations in electrical circuits (e.g. alternating current)
• In radio signals, the frequency of the radio wave produced matches the what?

  The frequency of the electrical oscillation - this is how a radio signal is produced
• How is signal received?

  When radio waves are absorbed by a conductor , they create an alternating current with the same frequency as the radio wave
• What happens when an oscillation is induced in an electrical circuit?

  It creates an electrical signal that matches the wave