Q) What is the resistance in a circuit for which the applied voltage is 12 volts, and the current flow is 1.5 amperes?
A) 8 ohms
NJ2X Notes:
Ohm's Law was discovered by Georg Simon Ohm and is worth committing to memory:
E = I * R
or by manipulating the terms algebraically:
I = E / R
or
R = E / I
In this example:
R = E / I
R = 12 volts / 1.5 amperes = 8 ohms
This question is from the FCC Element 2 Technician Class Question Pool
Effective July 1, 2010 for examinations and is valid until June 30, 2014
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