which material would you use as the metallic core of an electromagnet?
which material would you use as the metallic core of an electromagnet?
Answer
Brief Explanations:
An electromagnet's core needs to be a ferromagnetic material which can be easily magnetized and demagnetized. Nails are usually made of iron - a ferromagnetic material. A cola can is usually made of aluminum which is not ferromagnetic. The third option (the red - boxed item not clearly identifiable but likely not ferromagnetic either). So nails are the best choice for an electromagnet core among the given options.
Answer:
The nails (first option)