An induced current is produced in a coil when ............... changes within it.

alternating

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less

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primary

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magnetic field

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Solution

The correct option is D magnetic field
An induced current is produced in a coil when magnetic field changes within it.
A changing magnetic field through a coil of wire therefore must induce an emf in the coil which in turn causes current to flow.

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An induced current is produced in a coil when ............... changes within it.

The correct option is D magnetic fieldAn induced current is produced in a coil when magnetic field changes within it.A changing magnetic field through a coil of wire therefore must induce an emf in the coil which in turn causes current to flow.

The correct option is D magnetic field
An induced current is produced in a coil when magnetic field changes within it.
A changing magnetic field through a coil of wire therefore must induce an emf in the coil which in turn causes current to flow.