Electricity And Magnetism Question Preview (ID: 45695)


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Where does all the electricity we use come from?
a) lightning
b) generators in power plants
c) atoms wiht charged particles
d) insulated metal wires

Which kind of atom has an electrical charge?
a) an atom with a different number of electrons and protons
b) an atom with a different number of neutrons and electrons
c) an atom with an equal number of electrons and protons
d) an atom with an equal number of electrons, protons, and neutrons

Which important force includes both electricity and magentism?
a) magnoelection
b) electric-magnetic energy
c) magnoelectricity
d) electromagnetism

Lightining is an example of ________________.
a) electric current
b) static electricty
c) magnetism
d) insulation

What are amps, volts, and watts?
a) units used for measuring electricity
b) machines that make electricity
c) devises that deliver electricity
d) three ways to make magnets spin inside a generator

Why does a lamp stop working if its power cord comes loose?
a) The loose cord makes the electrons move rapidly back and forth.
b) The loose cord makes the electrons slow down.
c) The loose cord breaks the circut, so the current can't flow.
d) The loose cord touches metal, so the current flows faster and faster.

Why do electric power cords have metal wires inside?
a) Metal is magnetic
b) metal is a good insulator
c) metal is a good conductor
d) metal bends easily

Sometimes the ground and the the clouds have strong, opposite charges. What does charges mean in the sentence?
a) prices paid for products or services
b) matter is that is electrically postitive or negative
c) forward movements made during an attack
d) accusations made against a person

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

How can you tell that magnetism and electricity are very closely related?
a) both forces are used in homes, schools, and businesses
b) each force can be used to produce the other force
c) each force can be found in nature
d) both forces were discoverd by the same person

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