Annotated Circuit Diagrams

Progressive reveal demo

KVL: Mesh Analysis

Vs R1 R2 a b d c I + − V_R1 + − V_R2

KVL (clockwise)

\[-V_s + V_{R_1} + V_{R_2} = 0\]

Substituting Ohm’s law

\[-V_s + IR_1 + IR_2 = 0\]

Solving for current

\[\boxed{I = \frac{V_s}{R_1 + R_2}}\] Series resistors: currents equal, voltages add.