Explain how a radio antenna works when transmitting a signal.
What will be an ideal response?
Answer: An antenna is a copper wire or similar device that has one end up in the air and the other end connected to the ground. When transmitting, the radio waves are directed to strike this wire. This will set up an electrical pressure (voltage) along the wire. This pressure will cause a small electrical current to flow up and down the wire. The voltage causes a movement back and forth of the electricity in the antenna at the same frequency as the radio waves. Broadcasting or sending out radio waves is accomplished by forcing the electricity in the antenna to move at the same frequency as the radio waves.
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