U5 Forces In Nature Question Preview (ID: 63033)
Electric Current, Magnets, Static Electricity.
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In an electric generator, such as at a power plant, what produces electric current?
a) The movement of magnets around wire coils
b) The movement of wire coils in a magnetic field
c) A magnetic field being quickly turned on and off
d) Rapid coiling and uncoiling of wire around a magnet
a circuit that has only one path for the electric current to follow or in which all included devices receive the same current
a) electric circuit
b) series circuit
c) ion circuit
d) parallel circuit
Magnetism created by an electric current; ex: MRI or electric motor
a) mechanical magnetism
b) thermal magnetism
c) electromagnetism
d) solar magnetism
Electric current flows in a closed electric circuit
a) From negative pole of dry cell to positive one
b) From positive pole of dry cell to negative one
c) The poles of dry cell doesn’t produce current
d) All of the above choices
A region of space near a magnet, electric current, or moving charged particle in which a magnetic force acts on any other magnet, electric current, or moving charged particle.
a) Magnetic Field
b) Electric Field
c) Electric Charge
d) Force Field
The electrical components form a path for the electric current to flow through. The path is called an electric ....
a) current
b) circuit
c) wire
d) sound
This illustration shows a hand generator. Turning the handle of the generator spins a magnet and creates an electric current that lights the bulb. Which of the following observations can be used to indicate the strength of the current created by th
a) The brightness of the bulb
b) The size of the magnet
c) The length of the handle
d) The mass of the generator
What is electric current?
a) Flow of neutrons
b) Flow of electrons
c) Flow of protons
d) Breakdown of the nucleus
Electric current can be generated by
a) harnessing the magnetic energy in the earth's atmosphere
b) attaching a compass to a lodestone
c) sliding a magnet back and forth through a coil of wire
d) capturing the flow of electricity with a meter
A material that resists electric current
a) conductor
b) insulator
c) static electricity
d) electron
Electric current passes easily through a
a) resistor
b) conductor
c) insulator
d) switch
What happens when electric current in an electromagnet is stopped?
a) The wires becomes magnetized.
b) The wire loses its magnetism.
c) The electromagnet becomes stronger.
d) The electrical energy becomes stronger.
Tyler hangs a magnet from a string. He then takes another magnet and moves it toward the magnet on the string. Both magnet have the south pole facing each other. What will happen to the magnet on the string?
a) It will stay in the same position
b) It will begin to spin around in a circle.
c) It will be attracted to the other magnet
d) It will move away from the other magnet.
If you attach a magnet to a string so that the magnet is free to rotate, you will see that one end of the magnet will point...
a) north
b) southwest
c) east
d) west
Jane puts the north pole of a bar magnet near an object on her desk. As the magnet gets closer to the object, the object is repelled and moves away from the magnet. Which of th
a) The object has a north pole but no south pole.
b) The object is a magnet or has been magnetized.
c) The object has randomly-arranged domains.
d) The object is not made of metal.
Mohamed puts a nail closer to a magnet to see when the magnet will attract it. What property is he testing?
a) the strength of the magnet
b) the size of the magnet
c)
d)
What would happen to the magnetic field of a magnet if another magnet was introduced?
a) The magnetic field would increase
b) The magnetic fields would cancel each other out
c) The magnetic field would decrease
d) Nothing would change
The type of magnet that is said to be inside the Earth is a _________ magnet
a) horseshoe
b) doughnut
c) bar
d) wand
Sam was shown four objects, one of which did not contain a magnet. Which should be selected as the one that does NOT contain a magnet?
a) Wind-up clock
b) Television
c) Electric can opener
d) Cassette recorder
If you wanted to use one magnet to pick up another magnet, what shoud you do?
a) touch the first magets's norht pole to the second magetcs north pole.
b) touch the first magets south pole to the second magets south pole
c) touch the first magets north pole to the second magets south pole
d) demagnetize both magnets so netiher one has a north or south pole
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