4. The strength of the electromagnet depends on: o to the strength of the current flowing in the circuit o the mass of the iron or steel core o the amount of copper wire used o all of the above
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Answer:
The strength of the electromagnet depends on the number of times the copper wire is coiled
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Answer:
Option D
Explanation:
The strength of the magnetic field produced by such an electromagnet depends on the number of coils of wire, the magnitude of the current, and the magnetic permeability of the core material; a strong field can be produced from a small current if a large number of turns of wire are used