Series Circuit Rules

Current:

All components in a series circuit have the same current:

I_T=I_1=I_2=I_3=I_N

Voltage:

The total voltage in a series circuit is equal to the sum of the voltage dropped across each component:

V_T = V_1+V_2+V_3+...+V_N

Resistance:

The total resistance in a series circuit is equal to the sum of the resistance values from each component:

R_T = R_1+R_2+R_3+...R_N