What happens to the total resistance when an additional resistor is added in series?

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Multiple Choice

What happens to the total resistance when an additional resistor is added in series?

Explanation:
In a circuit where resistors are in series, the current is the same through every resistor, but each resistor adds its own opposition to that current. The total resistance is simply the sum of all the individual resistances: R_total = R1 + R2 + … Adding another resistor in series increases that sum, so the overall opposition to current grows. For example, two 10-ohm resistors in series equal 20 ohms; adding another 10-ohm resistor makes it 30 ohms. So the total resistance increases when you add a resistor in series.

In a circuit where resistors are in series, the current is the same through every resistor, but each resistor adds its own opposition to that current. The total resistance is simply the sum of all the individual resistances: R_total = R1 + R2 + … Adding another resistor in series increases that sum, so the overall opposition to current grows.

For example, two 10-ohm resistors in series equal 20 ohms; adding another 10-ohm resistor makes it 30 ohms. So the total resistance increases when you add a resistor in series.

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