Download Describe the relationship between voltage and current. As voltage

1. Describe the relationship between
voltage and current.
a. As voltage increases, current
increases
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2. Describe the relationship between
current and resistance.
a. As resistance increases, current
decreases
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3. Name and describe the three things
that we discussed that affect the
strength of an electromagnet.
a. Core-the item in the middle of
the coils, iron is strongest
b. Current-the amount of charge
flowing
c. Coils-the number of times the
wire is wrapped around the core,
the more coils, the stronger the
electromagnet
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4. Name the type of each circuit above.
a. I-Simple circuit
b. II-Series circuit
c. III-Parallel Circuit
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5. Which of these circuits will have the
dimmest bulb (s)? Explain.
a. The II circuit will have the
dimmest bulbs because they are
on a series circuit so the two
bulbs are sharing the 2 batteries.
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6. How can you increase the current
moving through any of the circuits
above?
a. The current can be increased by
increasing the amount of voltage
in the battery
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7. What is the function of a battery in a
circuit? (Hint-It pushes something
through the circuit)
a. The battery provides the voltage
for the circuit
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8. Why are most electrical wires covered
with rubber or plastic?
a. To guide the electricity in them
and to keep them from shorting
out
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9. Where around a magnet are the fields
the strongest?
a. Magnetic fields are strongest at
the poles
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10. Describe what is meant by a closed
circuit? Why is this important?
a. A closed circuit is a circuit that
does not have an opening
b. Closed circuits are important
because it allows electricity to
run through the circuit, if there is
an opening the circuit it will not
work.
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11. What is the most basic requirement for
an electromagnet?
a. A length of electrified wire
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12. How does increasing the coils affect the
strength of the magnetic field in an
electromagnet?
a. Increasing the number of coils in
an electromagnet increases its’
strength.
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13. What did the lines look like when you
drew your magnetic fields in your
notebook?
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14. Describe what happens with like ends of
a magnet.
a. They repel each other
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15. Describe what happens with unlike ends
of a magnet.
a. They attract each other
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16. True or False-All magnets have a
magnetic field
a. True
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17. What is meant by field force?
a. The interaction between objects
is a non-contact force that acts
over some distance of separation
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18. What are some examples of field forces
observed during this unit?
a. Magnetic Fields-the Magnetic
Field Investigation and Planetary
Magnet Investigation, on the
Magnetic Probe Day, the
Investigation Evaluation Day, and
BrainPop
b. Electrostatic fields-the Static
electricity Investigation, Static
Electricity Probes, the
Investigation Evaluation Day,
BrainPop and Bill Nye
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19. What are examples of evidence you
could use to tell if a field force exists in
an investigation?
a. Magnetic fields- if the objects pull
towards each other or if they
repel each other, if a compass
needle is attracted to the object
b. Electrostatic fields-if you are
shocked, if objects pull towards
each other or repel
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20. What causes static electricity? How
does static electricity work between like
and unlike charges?
a. Static electricity is caused by the
build-up of electrons
b. Like charges repel (positive and
positive or negative and
negative)
c. Unlike charges attract (positive
and negative)
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21. Name and describe the three things
that we discussed that affect the
strength of an electricity.
a. Voltage-for force that caused
the free electrons to move
b. Current-the amount of charge
flowing
c. Resistance-the measure of how
tightly material is holding
electrons
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