What happens when electrical resistance is added in a series circuit?
In a series circuit, the sum of the resistances is the total circuit resistance. The circuit current will fall. The voltage will split between the resistances. In a parallel connection, the circuit resistance is a value lower than the lowest value in parallel. The circuit current will rise. The same voltage will be across all resistors, but the current will split between the individual resistances. The formula is 1/R = 1/R1 + 1/R2 + 1/R3, etc., for as many values that are in parallel, to find effective resistance. I = E/R, where I is current in amperes, E is pressure in volts, and R is resistance, in ohms. Ohm’s law.
