When there is no voltage the electrons are still moving randomly. Since the numb

Question

When there is no voltage the electrons are still moving randomly. Since the number of electrons moving one direction is balanced by electrons moving the opposite direction then there is no net magnetic field. There is no magnetic field because there is no net flow of electrons. Predict what you think will happen if a magnet approaches a wire loop. Will the movement of electrons producing the same magnetic field be encouraged or discouraged? Will the movement of electrons producing the opposite magnetic field be encouraged or discouraged?

Explanation / Answer

If a magnet moves moves towards the wire loop, the loop will attempt to balance out the change in the net magnetic field by inducing a current that will create a counteracting magnetic field. (It's like Newton's Third Law, which states that every action has an equal and opposite reaction). Because of this induced current and new counteracting magnetic field, electrons producing the same magnetic field will be discouraged (as most other electrons will be producing counteracting magnetic fields).

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