Question

explain why adding more cell to a series circuit will cause bulb in the circuit to glow more brightly ​

Answer 1

I think that's for the parallel

Explanation:

when more resistors are connected in series,there is a greater obstruction to the flow of charge and that means the total resistance increases

Whereas when in parallel when more resistors are added there are more routes opening for the current to flow through causing greater ease of current to flow.Therefore the total resistance in the circuit decreases.As a result of this,the total current through the battery increases☺Hope it helps that's the way I understand it