Standard Science Primary 5 Systems

Ravi tested several objects in a circuit. Which of the following will cause the bulb to light up?

A A glass marble
B A dry wooden stick
C A plastic ruler
D A silver coin
Show Worked Solution

Worked Solution

Step 1: For the bulb to light, the circuit must be closed. Step [2-9]: The material in the gap must be an electrical conductor. Step [2-9]: Silver is a metal and a good conductor of electricity.

Correct answer: A silver coin

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

Start Free Trial — 7 Days Free