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☆☆☆☆☆Cards in this guide (5)
Do electric and magnetic fields always form closed loops
Magnetic fields do, because there's no such thing as an isolated magnetic "pole",
and a magnetic line always starts and ends at opposite poles of the same
magnetized object.
But electric fields don't. You can easily have a bundle of isolated positive charge
over here and a bundle of isolated negative charge over there, whereupon the
lines of the electric field start on one bundle and end on the other bundle.
But electric field lines can also exist in closed loops, and they do that in radio waves, where the electromagnetic field propagates with an electric field component and a magnetic field component, and they both form closed loops.
When none of the magnetic domains in a material will stay aligned the material is called
not magentic
An atom that is only weakly affected by a magnetic field
diamagnetic
What type of fields are created by an arrangement of electric charges or a current
Magnetic fields can be created by charges or the flow of current.
In terms of the scientific definition of work magnetic fields can do work but electric fields cannot true or false
false
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