Which electromagnet is the strongest?


A black bar with 5 copper colored coils around it.


A black bar with 2 copper colored coils around it.


A black bar with 7 copper colored coils around it.


A black bar with 4 copper colored coils around it

Respuesta :

Answer:

A black bar with 7 copper colored coils around it.

Answer:

c

Step-by-step explanation:

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