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Physics

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Dixie Langosh

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2y ago
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Cards in this guide (7)
A quantum of energy as defined in the Quantum Mechanical Model is a

exact, whole number amount of energy needed to move an electron to a higher energy level

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.

In a closed circuit what does an increase in voltage cause

an increase in current, hence increased power and increased heat.

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.

Where would shock from an electrified fence be the least unpleasant if standing A barefoot on wet grass during rain B on a rubber mat or very dry ground C on a metal ladder against the fence

You would need to be standing on some kind of electrical insulator, such as a rubber mat, or on very dry ground.

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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