Standard Science Primary 5 Systems

In which of the following circuits will the bulbs be the brightest? (All bulbs and batteries are identical and new).

A One battery and two bulbs in series
B Two batteries and one bulb in series
C Two batteries and two bulbs in series
D One battery and one bulb
Show Worked Solution

Worked Solution

Step 1: Brightness depends on the amount of current flowing through the bulb. Step [2-9]: Increasing batteries in series increases voltage/current. Step [2-9]: Having fewer bulbs in series means each bulb receives more electrical energy.

Correct answer: Two batteries and one bulb in series

Want more questions like this? Superholic Lab has 10,000+ MOE-aligned questions with full worked solutions.

Start Free Trial — 7 Days Free