# Explain why the resistance of several resistors in series is increased if an additional resistor is connected in series with them? [4 marks]

Mar 25, 2018

Resistances are added when resistors are connected in series

#### Explanation:

In series circuit, ${R}_{T} = {R}_{1} + {R}_{2} + {R}_{3} + \ldots + {R}_{N}$

Therefore, any extra resistors added on to the circuit will always increase the total resistance ${R}_{T}$

Mar 25, 2018

The addition of a resistor adds to the struggle of the moving charged particles.

#### Explanation:

It is not exactly the way you asked the question. Assume there were 3 resistors: ${R}_{1} , {R}_{2} , \mathmr{and} {R}_{3}$. Then you add ${R}_{4}$. So now there are 4 resistors in series. The original 3 still have the same resistance. But the group

${R}_{1} , {R}_{2} , {R}_{3} , \mathmr{and} {R}_{4}$
has more resistance than the previous group,
${R}_{1} , {R}_{2} , \mathmr{and} {R}_{3}$.