An electric motor best makes use of the fact that on a current-carrying wire in a magnetic field there exists which of these?. A) electromagnetic energy to be tapped.B) rotation.C) All of these.D) a force.E) a changing voltage.

Is this roation or all of these???

it is not rotation, and it is not all of these.

What exactly causes a Lorentz force?

the section in the chapter states form what I am getting it, is rotation, force and a states voltage. It is no very clear

What exactly causes Lorentz force? Why do you think I asked you that question?

http://en.wikipedia.org/wiki/Lorentz_force

is the force on a point charge due to electromagnetic fields.

thanks!!

In an electric motor, all of these options are involved. When a current-carrying wire is placed in a magnetic field, it experiences a force due to the interaction between the magnetic field and the electric current. This force causes the wire to move or rotate, resulting in the rotation of the motor.

So, the correct answer would be option C) All of these.