How to Calculate Total Resistance of Christmas Tree Lights Connected in Series

Question:

If a set of Christmas tree lights have ten identical small bulbs connected in series, each with a resistance of 240 ohms, what is the total resistance of the set of lights?

Answer:

The total resistance of the set of Christmas tree lights is 2400 ohms.

When calculating the total resistance of a set of Christmas tree lights connected in series, you can simply multiply the resistance of one bulb by the number of bulbs in the circuit.

In a series circuit, the total resistance is the sum of the individual resistances. Since the ten identical bulbs are connected in series, their resistances add up. Therefore, the total resistance of the set of Christmas tree lights can be calculated as follows:

Total Resistance = Resistance of one bulb x Number of bulbs

Total Resistance = 240 ohms x 10 bulbs = 2400 ohms

Therefore, the total resistance of the set of Christmas tree lights connected in series is 2400 ohms.