OHM'S LAW (V = I x R)

This formula is going to be super important as we try to build our own circuits and need to determine the correct component for our schematic:

VOLTAGE (V) = CURRENT (I) x RESISTANCE (R)

• V= I x R
• I = V / R
• R= V / I

VOLTAGE is expressed in VOLTS
CURRENT is expressed in AMPS*
RESISTANCE is expressed in OHMS

• volts = amps x ohms
• amps = volts / ohms
• ohms = volts / amps

A trick I learned to remember this formula is to think of each letter as an animal (vulture, iguana, rabbit). The vulture is flying above, and the iguana and the rabbit are below.

• To the Vulture, the Iguana and Rabbit are at the same level. (V=I x R)
• To the Iguana, the Vulture is above the Rabbit. (I = V / R)
• To the Rabbit, the Vulture is above the Iguana. (R = V / I)

*mA = MILLAMP = 1/1000 amp = .001 amp