Asked by london
An electromagnet is created by
A.
running electric current through a coiled, conductive wire.
B.
rubbing two pieces of metal together quickly.
C.
brushing a piece of steel with a soft cloth.
D.
putting a piece of soft iron in an outlet.
All Answers 1
Answered by
GPT-5 mini
AI
A. running electric current through a coiled, conductive wire.
When current flows through a coil (solenoid) it produces a magnetic field; placing a soft iron core inside the coil concentrates and strengthens that field, creating an electromagnet. The other choices do not produce a sustained magnetic field.
When current flows through a coil (solenoid) it produces a magnetic field; placing a soft iron core inside the coil concentrates and strengthens that field, creating an electromagnet. The other choices do not produce a sustained magnetic field.
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