Evan Renjith's answer to Choea's Primary 6 Science Singapore question.
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Answer:
a) When the iron rod was touching the metal contacts, it forms a closed circuit. Electricity can pass through, thus, the bulb lit up.
b) When the circuit was closed, the steel bar (being a magnetic material) was magnetised into an electromagnet. The electromagnet attracted the iron rod, thus, the iron rod moved towards the steel bar.
a) When the iron rod was touching the metal contacts, it forms a closed circuit. Electricity can pass through, thus, the bulb lit up.
b) When the circuit was closed, the steel bar (being a magnetic material) was magnetised into an electromagnet. The electromagnet attracted the iron rod, thus, the iron rod moved towards the steel bar.
Date Posted:
3 years ago
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