Advanced Science Primary 5 Systems

In a series circuit with one battery and one bulb, what happens to the brightness of the bulb if another identical bulb is added in series?

A It goes out.
B It stays the same.
C It becomes dimmer.
D It becomes brighter.
Show Worked Solution

Worked Solution

Step 1: Adding bulbs in series increases the total resistance of the circuit. Step 2: The electrical energy from the battery is shared between more bulbs. Step 3: Each bulb receives less energy and becomes dimmer.

Correct answer: It becomes dimmer.

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