diff --git a/Electronics/Physics_of_electricity/Coulombs_Law.md b/Electronics/Physics_of_electricity/Coulombs_Law.md new file mode 100644 index 0000000..e69de29 diff --git a/Electronics/Physics_of_electricity/Current.md b/Electronics/Physics_of_electricity/Current.md index 3f72ea7..077b35d 100644 --- a/Electronics/Physics_of_electricity/Current.md +++ b/Electronics/Physics_of_electricity/Current.md @@ -6,14 +6,17 @@ tags: [physics, electricity] # Current -When an appropriate external force is applied, the movement of electrons is from negatively charged atoms (negative ions) to positively charged atoms (positive ions). We call this **electrical current**. +> Electrical current is the movement of electrons from negatively charged atoms to negatively charged atoms when an appropriate external force is applied. -We use the symbol $I$ to stand for current in equations. +So current is the flow of electrons. Charge is the quantity that flows. Current exists because of the [first law of electrostatics](/Electronics/Physics_of_electricity/Coulombs_Law.md). > The amount of current is the sum of the charges of the moving electrons past a given point. +We use the symbol $I$ to stand for current in equations. + + ## Coulombs and amps -We measure **charge** in Coulombs ($C$). A Coulomb is an aggregate of the charge of several electrons because their charge is so small: $6.24 \cdot 10 ^{18}$ electrons. +We measure **charge** in Coulombs ($C$). A Coulomb is an aggregate of the charge of several electrons because their individual charge is so small: $6.24 \cdot 10 ^{18}$ electrons. We measure **current** in amps. When one coulomb of charge moves past a point in one second it is called an **ampere** (amp) represented as $A$.