Transcript Student Sample_ Electricity_Jeopardy Review

Remember each question will be
in the form of an answer and you
must respond with a question.
GOOD LUCK
Here are the categories
May the Force be with
You
(Forces & Electrical
Charges)
Electrical Charge Carriers
Don’t pick this category
(Making Electricity Flow)
Resistance is futile!
(Resistance, current, &
voltage)
Knowledge is Power
Shocking, but true?
May the Force
be with You
(Forces &
Electrical
Charges)
Electrical
Charge
Carriers
Don’t pick this
category
(Making
Electricity Flow
)
Resistance is
futile!
(Resistance,
current, &
voltage)
Knowledge
is Power
Shocking,
but true?
$100 $100 $100 $100 $100 $100
$200 $200 $200 $200 $200 $200
$300 $300 $300 $300 $300 $300
$400 $400 $400 $400 $400 $400
$500 $500 $500 $500 $500 $500
Unlike Charges _______ one
another.
attract
Like charges _______ each other
repel
Name the two kinds of electrical
charges.
Positive & Negative (or proton and
electron)
In the Find Out Activity in section
1-1, you put 2 pieces of scotch tape
on top of each other (then pulled)
as well as put 2 pieces of tape on
the desk side by side (then pulled).
What happen when the tapes were
brought close together and WHY?
You caused the tapes to have an
electrical charge. The tapes on top
of each other had opposite charges
and attracted each other. The
tapes side-by-side had similar
charges and repelled each other.
Thales, a Greek who lived in
600 B.C., named the effects of
electricity after the Greek
word for Amber. What is that
word?
Elektron (electron)
Give 3 examples of an insulator
Paper, plastic, rubber, wood, glass
Give 2 examples of a conductor
Most metals (copper, aluminum,
gold, silver), the Human Body
What is a conductor. Define it.
A material in which electrical
charges move freely from place to
place.
Explain how/why a balloon will stick
to a wall if charged?
The uncharged wall is attracted to
the charged balloon. The charges
on the balloon repel the like
charges on the wall’s surface. The
remaining unlike charges are
attracted to the charges on the
balloon. The charge is enough to
overcome gravity.
Unless you insulate it, you cannot
charge an aluminum comb by
rubbing it with fur, wool, or silk
because….
….The charge flows away (through
you holding it). I cannot hold a
charge. It is a conductor so
charges move freely from place to
place. You and your hand are
conductors so the charges flow
through the balloon, into your
hand/body.
Potential difference in electrical
energy is measured in ___(what
units?) and is called ______.
Volts and is called Voltage (or
potential difference)
How much electric charge flows
past a point in a circuit during a
given time is called _____.
Current
A complete path through which a
charge flows is called _____.
Circuit
_____ is a property of materials that
indicates how much energy changes to
thermal energy and light as an
electrical charge flows through the
material.
Resistance
When we look at lightening and its
charges, which has a positive
charge and which has a negative
charge in the initial formation of
lightening?
the stepped leader from the
clouds ; OR the streamer from the
ground?
The stepped leader coming down
from the cloud has a negative
charge. The streamer going up
from the ground has a positive
charge.
The relationship among current,
resistance, and potential
difference can be measured using
__________’s Law
Ohm’s Law
A circuit has a battery (12
Volts), and a resistor (3 Ohms).
What is the current of this
circuit?
4 Amperes (amps)
A circuit has a current of 5 Amps
and 10 Ohms of resistance
throughout it.
What is the voltage of this circuit?
50 volts
You observe that a very large
voltage produces only a small
current in a circuit. What can you
conclude about the resistance of
the circuit?
The resistance is high.
Would you connect a battery to a
bulb with a thick or thin copper
wire if you did not want the wire to
become hot? Explain.
A thick wire as a thin wire has
greater resistance and would tend
to get hot more readily than a
thick wire.
If a charged rod is brought near a
small piece of uncharged
aluminum foil, the foil will
_____
a. not be attracted to the rod
b. be repelled
c. not be affected
d. be attracted to the rod
d. be attracted to the rod
The difference in potential energy
per unit charge between the two
terminals of a battery is measured
in
a. ohms
b. volts
c. amperes
d. watts
b. volts
If you are outside during a
thunderstorm, which is the safest
place to be in order to avoid
being struck by lightning: near an
iron fence, under a tree, or in a
ditch? Why?
The safest place is in a ditch
because the lightning will strike
the highest point, and the ditch is
the lowest of the three
What is the formula relating
potential difference, current, and
resistance? (AND who’s law is it?)
Ohm’s Law:
I=V/R, or
V=IR, or
R=V/I
Two batteries produce a potential
difference of 18V. A resistor is
added with a resistance of 9 ohms.
What is the current (use proper
units as well!)
Answer: 2 Amps
I=V/R
I= 18 Volts/ 9 ohms
I = 2 Amperes
Static electricity is the
accumulation of _____.
electrical charges
A charge flows through a
conductor _____.
a.only if it is negatively charged.
b.only if it is positively charged.
c.only if there is no difference in
potential.
d.as an electric current.
D. As an electric current.
Electrons will flow through a
lightbulb in a circuit as long as
there is _____.
a.no change in resistance
b.no static discharge
c.an open circuit
d.a potential difference
d.a potential difference
Why is a lightning rod effective?
When a lightning strike occurs,
the rod provides a low-resistance
path for the lightning charge to
be conducted away from the
structure. Also, the lightning rod
may be the tallest structure, and
lightning will take the shortest
path to the ground.
How can you demonstrate that
there are two kinds of electrical
charges?
You can show two kinds of
electrical charges by allowing
objects that have a charge to
interact. Objects having like
charges will repel and objects
having unlike charges will attract.
Electricity, Baby!
Would you expect a bulb to burn
brighter, dimmer, or the same in a
circuit after you removed one
fourth of the total length of the
electrical wire and then
reconnected the circuit? Explain.
The bulb should burn slightly
more brightly because the shorter
the wire (conductor), the lower
the resistance. This would allow
more current to give a brighter
light.
And the winner is…..