How does a magnetic field cause electric charges to form an electric current? O A. A force is exerted by the magnetic field on only the positive charges in the wire. B. Negative charges and positive charges are pushed in opposite directions by the magnetic field. C. A force is exerted by the magnetic field on only the negative charges in the wire. D. Negative charges and positive charges are pushed in the same direction by the magnetic field.

The magnetic field causes electric charges to form an electric current which is responsible to push the positive and negative charges in the opposite direction because there is a magnetic field working as a magnetic effect of the electric current which results in negative charges and positive charges being pushed in opposite directions by the magnetic field. Therefore the correct option is B.

What is a magnetic field?

A magnetic field could be understood as an area around a magnet, magnetic material, or an electric charge in which magnetic force is exerted. The SI unit of the magnetic field is tesla.

The magnetic field is responsible for electric charges to form an electric current which results in pushing the positive and negative charges in the opposite direction.

There is a magnetic field working as a magnetic effect of the electric current which results in negative charges and positive charges being pushed in opposite directions by the magnetic field. Therefore the correct option is B.

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