In a magnetic field, what will any magnetic material experience?
A magnet sweeps over a junk drawer. Some things leap up to it. Most never stir.
The last lesson said that in a magnetic field, any magnetic material will experience a force. This lesson sorts the materials: which ones are magnetic?
Put each material, one at a time, into the same magnetic field.
Put this piece of wood in the magnetic field. It won't experience a force, because wood is not magnetic. But this piece of iron will experience a force, because iron is magnetic.
And this piece of nickel will experience a force, because nickel is magnetic too. And this piece of cobalt will also experience a force, because cobalt is magnetic. But this piece of plastic won't experience a force, because plastic is not magnetic.
A drinking glass is placed in a magnetic field. Will it experience a force?
But a metal is not automatically magnetic. Aluminum is a metal, and aluminum is not magnetic. Copper is a metal, and copper is not magnetic.
A steel wrench is placed in a magnetic field. Will it experience a force?
Ask the sorting question:
Is the wrench iron, nickel, cobalt, or steel? It is steel.
Steel is mostly iron, so steel is magnetic.
Yes: the steel wrench will experience a force.
A steel bottle cap is placed in a magnetic field. Will it experience a force?
A rubber eraser is placed in a magnetic field. Will it experience a force?
Ask the sorting question:
Is the eraser iron, nickel, cobalt, or steel? It is none of them.
So rubber is not magnetic.
No: the rubber eraser will not experience a force.
Lior says some metals will not experience a force in a magnetic field. Is Lior correct?
Back at the junk drawer: the steel screws leap to the magnet. The aluminum pull-tabs never stir.
Which object will experience a force in a magnetic field?
Which pairing of material and behavior in a magnetic field is correct?
An aluminum hinge and a steel clamp both sit inside a magnetic field. Which objects experience a force?