Question

Which of the following electromagnets would have the greatest magnetic field?

A- electromagent with long nail and 3 coils
B- electromagnet with short nail and 2 coils
C- electromagnet with short nail and 4 coils
D- electromagnet with long nail and 1 coil
C- electromagnet with short nail and 4 coils. Having more coils creates a stronger magnetic field, and while the length of the nail can also play a role, the number of coils is the most significant factor.

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