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Chapter 21: Q9CQ (page 771)

If two household lightbulbs rated 60W and 100W are connected in series to household power, which will be brighter? Explain.

Short Answer

Expert verified

In series to household power, 60W bulb will be brighter.

Step by step solution

01

Definition of voltage

The energy usage rate of one joule every sec is described as one watt.

02

Finding which bulb will be brighter

A bulb's resistance is inversely proportional to its power rating. That is, the higher the power rating, the lower the resistance. The resistance of the bulb is directly proportional to the bulb's power or brightness in series.A bulb's resistance is inversely proportional to its power rating. As a result, the resistance of a 60-watt bulb is higher than that of a 100watt bulb.

The resistance of the bulb is directly proportional to the bulb's power or brightness in series. As a result, the brightness of a 60W bulb will be higher due to its higher resistance.

Therefore, it will be brighter with a 60W bulb.

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