What happens to the resistance when two resistors are connected in series?

When two resistors are connected in series, the total resistance in the circuit is the sum of the individual resistances. This means that if you have resistor R1 and resistor R2 connected in series, the total resistance (R_total) can be calculated using the formula:

R_total = R1 + R2

As a result, the overall resistance increases when additional resistors are added in series. This is due to the fact that the current flowing through the circuit has to pass through each resistor sequentially, which adds up the resistance. Thus, the correct understanding is that the total resistance becomes greater than the resistance of either resistor alone.

The answer provided, which suggests that the resistance doubles, would only be true in specific scenarios where both resistors have the same resistance value. However, in a general case where the resistance values of R1 and R2 may differ, the total resistance will not simply double, but rather it will be the sum of both resistors. Hence, the correct interpretation should focus on the principle that resistance in series adds together, leading to an increase, rather than a doubling or halving effect.