December 27, 2013

FCC Technician Exam Question Of The Day (T5C09)

Q) How much power is being used in a circuit when the applied voltage is 13.8 volts DC and the current is 10 amperes?

A) 138 watts

NJ2X Notes:
NJ2X PIE Triangle

It is useful to memorize the PIE triangle.  By covering up one variable you get the equation.  So in this example:

P = I * E
P = 10 Amps * 13.8 volts = 138 Watts

Easy as PIE!


Written by: NJ2X, Michael Maher