My son like to play the electromagnet a lot like general children. And He read science books Found content with magnetic. He read science books Found content with magnetic.
We take the 24 SWG Coated copper wires turn on the diameter core of about 5mm screws is about 100 turns.
Then we scrape the insulated of copper out away. Next step apply the 3V battery and measure voltage it, the voltage low down to 0.5V.
The small screws that near it can be pulled to it same normal battery.
But this was not appropriate because the battery overheating Because of the current flow to the coil too much.
We should add the number of cycles and reduce the size of the copper wire to smallest cause lower current operation.
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