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... I thought that this factor would give me the most reliable results. The current I will keep constant at 0.2 amps, the thickness of the wire I have used for the coils will stay the same for both experiments. The coils of wire will be tied round at the same strength for both experiments. Henal Rajendra Patel CENTRE NUMBER: 14625 CANDIDATE NUMBER: 0127 PREDICTION & SCIENTIFIC KNOWLEDGE: I predict that the more current that passes through the wire the greater the electromagnetic pull of the soft-iron core will be. The less turns on the coil, will lead to less iron filings will be attracted to the electromagnet. When insulated wire is wrapped round an iron nail and the ends of the wire are connected to a battery the nail becomes capable of picking up iron filings. This is called an electromagnet. The nail is magnetised by the current in the wire. If ...