Ohm’s Law explains the relationship between voltage (V or E), current (I) and resistance (R)

Used by electricians, automotive technicians, stereo installers

Ohm’s Law

Where: I = current (amperes, A)

E = voltage (volts, V)

R = resistance (ohms, )

RE

I

Ohm’s Law: Resistance and Resistors

In many conductors, the resistance is independent of the voltage; this relationship is called Ohm’s law. Materials that do not follow Ohm’s law are called non-ohmic.

Unit of resistance: the ohm, Ω.

1 Ω = 1 V/A.

It is the push or pressure behind current flow through a circuit, and is measured in (V) volts.

Current refers to the quantity/volume of electrical flow. Measured in Amps (A)

Resistance to the flow of the current. Measured in Ohms

1. 1. Assuming the resistance does not change:

2. As voltage increases, current increases.3. as voltage decreases, current

decreases.

4. 2. Assuming the voltage does not change:

5. As resistance increases, current decreases.

6. As resistance decreases, current increases.

V (E) = I x R

I = V R

R = V I