<Dl> <Dd> V = V 1 = V 2 =...= V n (\ displaystyle V = V_ (1) = V_ (2) = \ ldots = V_ (n)) </Dd> </Dl> <Dd> V = V 1 = V 2 =...= V n (\ displaystyle V = V_ (1) = V_ (2) = \ ldots = V_ (n)) </Dd> <P> The current in each individual resistor is found by Ohm's law . Factoring out the voltage gives </P> <Dl> <Dd> I t o t a l = V (1 R 1 + 1 R 2 + ⋯ + 1 R n) (\ displaystyle I_ (\ mathrm (total)) = V \ left ((\ frac (1) (R_ (1))) + (\ frac (1) (R_ (2))) + \ cdots + (\ frac (1) (R_ (n))) \ right)). </Dd> </Dl>

Why is current in a series circuit constant