Example 1
A 12 V supply across a 6 Ω resistor gives I = 12/6 = 2 A.
Mendeleev
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Physics tools › Ohm’s law calculator
Mendeleev · Physics
Ohm’s law calculator
Ohm’s law relates voltage, current and resistance for an ohmic component under conditions where its resistance can be treated as constant.
Formula usedV = IR
Calculate
Ohm’s law calculator
What do the symbols mean?
Vvoltage
Icurrent
Rresistance
Two worked examples
Example 2
If 20 mA flows through 1.5 kΩ, the voltage is 30 V.
Good to knowIn English-language texts, potential difference is commonly written V: V = IR.