In a series circuit, adding resistors increases total resistance.

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Get ready for the NCCER Introduction to Electrical Circuits exam. Study with multiple choice questions, each question comes with hints and explanations. Ace your exam with confidence!

Multiple Choice

In a series circuit, adding resistors increases total resistance.

Explanation:
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.

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