In a series circuit, adding resistors increases total resistance.

In a series circuit, adding resistors increases total resistance.

• A. False
• B. Depends
• C. Only if same value
• D. True

Answer: (D)

In a series circuit, resistances simply add together. The total resistance equals R1 + R2 + … + Rn, so when you add another resistor in series, youcrease the sum and the overall resistance goes up. This also affects current: with a fixed voltage, I = V / R_total, so increasing R_total reduces the current. In practical terms, the added resistor has a positive resistance, so the total always increases; only a zero-ohm path would leave it unchanged, which isn’t typical for a resistor.

In a series circuit, resistances simply add together. The total resistance equals R1 + R2 + … + Rn, so when you add another resistor in series, youcrease the sum and the overall resistance goes up. This also affects current: with a fixed voltage, I = V / R_total, so increasing R_total reduces the current. In practical terms, the added resistor has a positive resistance, so the total always increases; only a zero-ohm path would leave it unchanged, which isn’t typical for a resistor.