FCC Technician Exam Question Of The Day (T5D05)

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