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If you make an electromagnet using a battery circuit and a steel nail, how can you increase its magnetic strength?
A.replace the nail with a copper rod
B.wrap more coils of wire around the nail
C.use a longer nail
D.remove the plastic insulation from the wire coil

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meerkat18
The correct answer is B. wrap more coils of wire around the nail. This is how you can increase its magnetic strength. Thank you for posting your question. I hope this answer helped you. Let me know if you need more help. 

Answer;

B.wrap more coils of wire around the nail

Explanation;

  • Electromagnets are made by winding a wire through a magnetic material such as soft iron core making a coil, and then passing electric current through the coil thus making the soft iron core magnetic.
  • The strength of the electromagnet depends on the number of coils and also the size of the electric current through the coil.
  • Therefore, in this case wrapping more coils of wire around the nail increases the strength of the electromagnet.
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