Transcript Electricity and Magnetism

Electricity and
Magnetism
Study Guide
Vocabulary
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Charge
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Static electricity
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Electric field
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Measurement of an
object’s extra positive
or negative particles.
Charge that stays on
an object.
Space around an
object where electric
forces occur.
Vocabulary
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Electric current
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Circuit
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Electric cell
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conductor
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Flow of electric
charges
Path made for an
electric current.
Supplies energy to
move charges
through a circuit.
Material that electric
current can pass
through easily.
vocabulary
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Insulator
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Resistor
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Series circuit
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Parallel circuit
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Material that electric
current can’t pass
through.
Material that resists
but doesn’t stop the
flow of current
Circuit with one path
for electric current.
Circuit with more than
one path for current.
vocabulary
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Magnet
Magnetic poles
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Magnetic field
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electromagnet
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Object that attracts
things made of iron or
steel.
Ends of a magnet
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Space around a
magnet where the
force acts.
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Arrangement of wire wrapped
around a core.
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An object has what charge if it has more
negatives than positives?
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Negative
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When two objects both have positive
charges, the objects…….
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Repel each other
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We use copper wire in our circuits
because it ______________ electricity.
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Conducts
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A bar magnet’s pull is strongest at….
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Both poles
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Magnets attract each other at…
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Opposite poles
Name 3 ways to control and
electromagnet.
 Turn the current on and off
 Add coils of wire around the core
 Decrease the amount of current by using a
smaller battery
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If a light bulb burns out, will the
others stay lit?
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What type of circuit is this?
What type of circuit is this?
If a light bulb burns out will the others stay lit?
Essay questions
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What two magnets make a compass
work? How do they interact?
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The earth is a large magnet. The needle
of a compass is a magnet. The needle is
attracted to the north and south poles of
the earth.
Essay question
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In what ways are electricity and
magnetism alike?
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Both use a flow of electrons to push and
pull objects. They both have positive and
negatives. The opposites attract and
repel.
Essay question
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What will happen if you put a compass next to
an electromagnet that is switched on?
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The compass needle will turn because an
electromagnet produces a magnetic field. The
compass needle will move to line up with the
flow of electrons.