F2 Science Electricity Exercise Top

Mr. Adebayo praised their demonstration. “Good observation and a neat application,” he said. He asked a final question: “How can we make circuits safer at home?” The group answered in unison: use insulated wires, switches, and careful design—plus never handle devices with wet hands.

Identify the mistake: “A student connects a voltmeter in series with a bulb. What happens?” (Answer: Very little current flows because voltmeter has high resistance; bulb barely lights.) f2 science electricity exercise top

Why do bulbs dim when adding more bulbs in series? Answer: Total resistance increases, so current decreases (Ohm’s Law). Lower current means less power to each bulb. f2 science electricity exercise top

: Materials with low resistance (e.g., copper, iron nails) that allow current to pass easily. Insulators f2 science electricity exercise top