How do magnetic fields work?

How do magnetic fields work?

All magnets have north and south poles. Opposite poles are attracted to each other, while the same poles repel each other. When you rub a piece of iron along a magnet, the north-seeking poles of the atoms in the iron line up in the same direction. The force generated by the aligned atoms creates a magnetic field.

Do perpendicular magnetic fields cancel out?

The magnetic field does not point along the direction of the source of the field; instead, it points in a perpendicular direction. In addition, the magnetic force acts in a direction that is perpendicular to the direction of the field. The strength of the magnetic field decreases with distance from the wire.

Is the magnetic field ever zero?

It’s not really true that magnetic field lines cannot cross, but where they do, the magnetic field strength has to be zero. Here’s why: A magnetic field line is that path in space that points in the direction of the magnetic field at every point along it. Magnetic field lines tend to follow closed loops, though.

What happens when magnetic field zero?

If the magnitude and direction of the velocity of the particle are constant, then the particle has zero acceleration. From Newton’s second law, we know that the net force on the particle is zero. But there is no magnetic field and, hence, no magnetic force. Therefore, the net force is the electric force.

Can magnetic fields cross?

Magnetic field lines can never cross, meaning that the field is unique at any point in space. Magnetic field lines are continuous, forming closed loops without beginning or end. They go from the north pole to the south pole.

Why magnetic fields are not unique?

The direction of the magnetic field is tangent to the field line at any point in space. A small compass will point in the direction of the field line. The strength of the field is proportional to the closeness of the lines. Magnetic field lines can never cross, meaning that the field is unique at any point in space.