# Why is Transmitter Output Called Power?

August 18th Fact-of-the-DayIn mathematics, a
power of a number indicates repeated multiplication. For example,
'x to the third power' means 'x multiplied by itself three times.' One
formula for electric power is current to the second power times resistance.
Electrical power therefore is proportional to the second power of current.
Another formula for electrical power is voltage to the second power divided
by resistance. Electrical power therefore is also proportional to the
second power of voltage. Transmitter output is called power because it
is proportional to the second powers of both current and voltage. However,
as you can see, it can be more precisely described as 'second power,'
but few people will understand if you describe it that way. *©2004
Martek International All rights reserved.*

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