Standard Science Primary 5 Systems

Stan has a circuit with one battery and one bulb. He wants to make the bulb brighter. What should he do?

A Add another identical battery in series.
B Add another identical bulb in series.
C Remove the switch from the circuit.
D Add another identical bulb in parallel.
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Worked Solution

Step 1: The brightness of a bulb depends on the amount of electrical energy flowing through it. Step 2: Adding batteries in series increases the total voltage (electrical push) in the circuit. Step 3: This causes more current to flow through the bulb, making it brighter.

Correct answer: Add another identical battery in series.

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