Question

if a resistor is added to a series circuit, what happens to the total resistance of the circuit?
a it decreases
b it becomes zero
c it increases
d it stays the same

Explanation:

In a series circuit, the total resistance \( R_{total}=R_1 + R_2+R_3+\cdots\). When an additional resistor \( R_{new}\) is added, the new total resistance \( R'_{total}=R_{total}+R_{new}\). Since \( R_{new}>0\), the total resistance increases.

Answer:

C. It increases