Question

multiple choice question
an electromagnet can be produced by passing a current

o near a magnetic compass made of silver
o through the wires of a solenoid
o through a solid metal sphere
o back and forth between two opposite static charges

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Explanation:

An electromagnet is formed when a current is passed through a solenoid (a coil of wire). A solenoid's structure allows the magnetic fields from each loop of wire to add up, creating a strong magnetic field similar to that of a bar magnet.

• A magnetic compass made of silver is not relevant to creating an electromagnet. Silver is not a magnetic material in the context of compass functionality for this purpose.
• Passing current through a solid metal sphere does not form the necessary coil - like structure for an electromagnet.
• Current back and forth between two opposite static charges is more related to an oscillating electric field (as in electromagnetic waves in some cases) rather than forming an electromagnet.

Answer:

through the wires of a solenoid