Current in a Circuit

Series Circuit

The current flow into a resistor = the current flow inside the resistor = the current flows out from the resistor

I_A = I_B = I_C

In a series circuit, the current at any points of the circuit is the same.

Parallel Circuit

The current flow into a parallel circuit is equal to the sum of the current in each branches of the circuit.

I = I₁ + I₂

Example

If the resistance of the 2 resistors is the same, current will be divided equally to both of the resistor.