In a series circuit, if you add more resistors, the current decreases?

In a series circuit, if you add more resistors, the current decreases?

• A. Current increases
• B. Current decreases
• C. Current stays the same
• D. Current becomes negative

Answer: (B)

In a series circuit, the total resistance increases when you add more resistors, because the resistances add up. With a fixed supply voltage, current is I = V / R_total, so as R_total goes up, the current goes down. The same current flows through all elements in a series circuit, but its magnitude is reduced as you add resistance. It won’t become negative or stay the same just from adding resistors. So the current decreases.

In a series circuit, the total resistance increases when you add more resistors, because the resistances add up. With a fixed supply voltage, current is I = V / R_total, so as R_total goes up, the current goes down. The same current flows through all elements in a series circuit, but its magnitude is reduced as you add resistance. It won’t become negative or stay the same just from adding resistors. So the current decreases.