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Radio: A Form Of Communication
Beginning of paper
Mr. Zambizi
Physics
Radio is a form of communication in which intelligence is transmitted without
wires from one point to another by means of electromagnetic waves. Early forms
of communication over great distances were the telephone and the telegraph. They
required wires between the sender and receiver. Radio, on the other hand,
requires no such ....
Middle of paper
....of the associated magnetic field induces a current in another
conductor placed in this changing magnetic field. This principle of
electromagnetic induction is well known in the application of transformers,
where an iron core is used to link the magnetic field of the first wire or coil
with a secondary coil. By this means voltages can be stepped up .... |
| Word count: 3073 |
Page count: 12 |
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