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1
what is the correct definition of induction?
the physical principle in which voltage is induced in a conductor, when it is placed in a magnetic field.
the physical principle in which voltage is induced in a conductor, when current is running through it.
the physical principle in which voltage is generated in a conductor, when exposed to a change in the magnetic field.

Explanation:

Electromagnetic induction, the relevant physical principle, requires a changing magnetic flux (change in magnetic field through the conductor) to induce voltage. A static magnetic field or steady current alone does not create induction.

Answer:

The physical principle in which voltage is generated in a conductor, when exposed to a change in the magnetic field.