Question

A copper coil is taken out of a magnetic field with a fixed velocity.
Will it be easy to remove it from the same field if its ohmic
resistance is increased?​

Answer 1

Answer:

Induction - Changing Magnetic Field in a Coil. Quoted from Wikipedia, Lenz's Law states that "An induced electromotive force (emf) always gives rise to a current whose magnetic field opposes the original change in magnetic flux." ... Since there is no change in magnetic flux, there is no induced current.

Answer 2

Yes, it is easy to remove it from the same field if its ohmic resistance is increased.

• A charged molecule in the magnetic field will invariably feel a force because of the field with increased ohmic resistance.

• A charged molecule in a magnetic field will perhaps feel a force because of the magnetic field in the event that it is moving compared with the increased ohmic resistance field.

• A current will be induced in the wire if a coil of wire is positioned in a changing magnetic field. This current flows because something is generating an electric field that impels the charges around the wire. This induced current reduces, so it is easy to remove a copper coil from a similar field if its ohmic resistance is increased.

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