Answer :
Final answer:
In order to weaken an electromagnet, you can replace the hollow core of the magnet, replace the steel core of the magnet, or decrease the number of wraps of wire.
Explanation:
In order to weaken an electromagnet, you can replace the hollow core of the magnet with a non-magnetic material (option A) and replace the steel core of the magnet with a non-magnetic material (option B). These actions will reduce the magnetic field produced by the electromagnet. Another action that would weaken an electromagnet is decreasing the number of wraps of wire (option E) around the core. The magnetic field strength of an electromagnet is directly proportional to the number of wire wraps, so decreasing the number of wraps will result in a weaker magnetic field.
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