Two separate but nearby coils are mounted along the same axis. A power supply co

Question

Two separate but nearby coils are mounted along the same axis. A power supply controls the flow of current in the first coil, and thus the magnetic field it produces. The second coil is connected only to an ammeter. The ammeter will indicate that a current is flowing in the second coil

only if the second coil is connected to the power supply by rewiring it to be in series with the first coil. only when the current in the first coil changes. whenever a current flows in the first coil. only when a steady current flows in the first coil.

Explanation / Answer

only when the current in the first coil changes.

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