diff --git a/education/computer engineering/circuits/units/Ohm.md b/education/computer engineering/circuits/units/Ohm.md
index 4c4b979..da3764f 100644
--- a/education/computer engineering/circuits/units/Ohm.md	
+++ b/education/computer engineering/circuits/units/Ohm.md	
@@ -2,4 +2,7 @@
 The Ohm ($\Omega$) is the unit of resistance and is a measure of a component's opposition to the flow of current ($A$). 
 
 In SI units, an ohm is defined as:
-$ \Omega 
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+$$ \Omega = kg \cdot m^2 \cdot s^{-3} \cdot A^{-2} $$
+
+For non-linear devices, the differential definition of resistance is:
+$$ r = \frac{d V}{d I} $$
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