![]() ![]() The strength of the magnetic field can be varied There is a limit to how much current can be passed safely through the wire because the resistance of the wire causes heating.ĭr Yan makes a powerful electromagnet by wrapping copper wire around pieces of iron and attaching a small batteryĮlectromagnets have some advantages over permanent magnets. Increasing the current flowing through the coil ![]() Wrapping the coil around a piece of iron (such as an iron nail) ![]() Now hand over the additional worksheets to make them think more profound about the concepts.You can make an electromagnet stronger by doing these things:
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