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Physics

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Gail Baumbach

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4y ago
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Cards in this guide (11)
What is the resistance in ohms of the computer-monitor combination when a desktop computer and monitor together draw about 1.2 A of current and they plug into a wall outlet that is 120 V

60

What are the substances that increase the rate of a chemical reaction called

Catalysts

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 terms of the scientific definition of work neither magnetic fields nor electric fields can do work

True

In a parallel circuit the is the same for every leg in the circuit

voltage

AB plus C plus B is the general equation for which one what types of chemical reactions

AB + C + B is not an equation: an equation requires two sets of compounds on either side of an equality sign. Furthermore, it cannot be any of the following types of reactions because there is nothing following.

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.

Why does shuffling feet across a carpet create electricity

Your feet get electrons from the carpet which produces static electricity. If you touch someone afterwards, you will most likely shock them.

Is an atom that has the same number of protons as neutrons a neutral atom

False. The atom that has the same number of protons as it has electrons is a neutral atom.

What will be attracted to or repelled by an magnet

a copper wire carrying current and another magnet.

Which of the following would be best to do of you were inside a car and a power line fell on the car

wait for someone from the power company to come ant help - APEX;0

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