What is an electric current?
What is the speed of the electrical disturbance traveling through a wire?
Describe an electromagnet and state some of its common uses.
What is meant by the magnetic field of a magnet?
State two methods that can be used to determine the direction of magnetism about a wire carrying current.
Station ABC broadcasting on a wavelength of 500 meters--on what frequency does it operate?
Why is it possible for Radio waves to penetrate thick walls?
What happens when Radio waves reach the receiving aerial?
What is the purpose of a radio frequency amplifier?
Explain the function of an audio frequency amplifier.
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Webpage | ©1997, Nostalgia Air |
Transcriber   | Richard Lancaster |