Explain why the resistance of several resistors in series is increased if an additional resistor is connected in series with them? [4 marks]
Resistances are added when resistors are connected in series
In series circuit,
Therefore, any extra resistors added on to the circuit will always increase the total resistance
The addition of a resistor adds to the struggle of the moving charged particles.
It is not exactly the way you asked the question. Assume there were 3 resistors:
#R_1, R_2, R_3, and R_4#
has more resistance than the previous group,
#R_1, R_2, and R_3#.
The term resistance is descriptive. Understanding that should help you visualize the answer to this problem.
A resistor resists the flow of current through it. The charged particles (electrons) have to struggle to get through them. So if you add one resistor to a string of them, the charged particles have that much more of a struggle to get through them all.
I hope this helps,