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Electricity Jeopardy
Electric Fields
Electrostatics and Potential
Coulomb’s
Law
Extra problems
and comparing
Feand Fg
Extra
Q $100
Q $100
Q $100
Q $100
Q $100
Q $200
Q $200
Q $200
Q $200
Q $200
Q $300
Q $300
Q $300
Q $300
Q $300
Q $400
Q $400
Q $400
Q $400
Q $400
Q $500
Q $500
Q $500
Q $500
Q $500
Final Jeopardy
$100 Electrostatics
How can you create a
positive ion of hydrogen?
$100 Answer Electrostatics
Take away the electron so only the
proton is left behind.
$200 Electrostatics
What is the difference between a conductor and an
insulator?
$200 Answer Electrostatics
Conductors have “free” electrons but insulators have tightly bound
electrons. This means that conductors allow electrons to move
through them easily, insulators do not.
$300 Electrostatics
When charges separate themselves due to
charging by induction, this is called what?
$300 Answer Electrostatics
Polarization.
$400 Electrostatics
What are the 3 ways to charge an
object? Give an example of each one.
$400 Answer Electrostatics
Friction
Conduction
Induction
$500 Electrostatics
What type of charging
is occurring when a
balloon sticks to a
wall? What is actually
happening between the
balloon and the wall?
$500 Answer Electrostatics
Induction: The negatively charged balloon will not transfer
charge since it is an insulator, instead, it induces an electric
dipole in the wall with the positive charges closer to the
outside and the negatives pushed further away from the
balloon.
$100 Question Electric Fields
and Potential
If you walk into a region of space and suddenly feel a force, the
space is said to contain a ____________.
a) Black hole
b) Charged object
c) Force field
d) Heavy object
e) Large charge
$100 Answer Electric Fields and
Potential
c) Force field
$200 Question Electric Fields
and Potential
If this were a hollow object with a build up of negative charge, draw
how the charge would distribute it self inside and explain what you
draw.
$200 Answer Electric Fields and
Potential
Charges bunch up at the corners in
order to make the net force in the
center equal to zero
$300 Question Electric Fields
and Potential
Draw the electric field lines between a positive
and a negative charge.
$300 Answer Electric Fields and
Potential
$400 Question Electric Fields
and Potential
Draw a diagram of the electric
field lines between two similar
positive charges.
$400 Answer Electric Fields and
Potential
$500 Question Electric Fields
and Potential
Why are you safe in a lighting storm
If you are sitting in your car?
$500 Answer Electric Fields and
Potential
The car acts like a faraday cage. All of the charge gathers on
the outside of the car keeping you safe.
$100 Question Coulomb
Which tends to be a stronger force,
gravitational force or electrostatic force?
$100 Answer Coulomb
Electrostatic Force
$200 Question Coulomb
If you quadruple the distance
between two charges, what
happens to the electrostatic
force?
$200 Answer Coulomb
Reduced by a factor of 16
$300 Question Coulomb
What will the force of between two
charges be if they start off with a
force of 15 N, but you double one of
the charges and you double the
distance?
$300 Answer Coulomb
7.5 N
$400 Question Coulomb
What is the electrostatic force
between two negative charges of
0.098 C separated by a distance
of 5 meters? Is it attractive or
repulsive?
$400 Answer Coulomb
3.5 x 106 N repulsive force
$500 Question Coulomb
What is the electrostatic force
between a proton and an
electron separated by a
distance of 7 x 10-8 N?
$500 Answer Coulomb
4.7 x 10-14 N
$100 Question Extra
Compare the relative
strength of gravitational
force to electrostatic
force force.
$100 Answer Extra
Electrostatic is much stronger
$200 Question Extra
Compare the gravitational force
and electro static force between a
proton and a neutron if they are
5x10-11m from each other. The
mass of a proton is 1.6x10-27kg and
the mass of a neutron is 1.6x10-27
kg. Remember the elementary unit
of charge is 1.6x10-19C
$200 Answer Extra
There is no electrostatic force
Fg= 6.8x10-44N
$300 Question Extra
Which particle feels a stronger electric field?
$300 Answer Extra
They feel the same strength
$400 Question Extra
Compare the strength of the gravitational force and the electrostatic
force of a proton and an electron if they sit 5x10-11 m away from
each other and the electron has a mass of 9x10-31kg and a proton has
a mass of 1.6x10-27kg.
$400 Answer Extra
Fg= 3.8x10-47N
Fe = 9.2x10-8N (Much stronger!)
$500 Question Extra
Name the 4
fundamental forces in
the universe.
$500 Answer Extra
Gravity
Weak Nuclear Force
Electromagnetic Force
Strong Nuclear Force
$100 Question Extra
Why will your hair stand up when you hold onto the
Van de Graff generator.
$100 Answer Extra
Electrons build up even in your hair and
the electrons repel each other.
$200 Question Extra
What type of charging causes the plastic on a CD to stick to you
when you first unwrap the CD?
$200 Answer Extra
Friction
$300 Question Extra
A positive Ion ____________ electrons.
$300 Answer Extra
Loses
$400 Question Extra
Why shouldn’t you get in and out of your car
when you pump gas?
$400 Answer Extra
You can charge yourself by friction when you slide in and out and then
arc to the gas when you go to take the pump out of the tank. FIRE!
$500 Question Extra
Why doesn’t it hurt you to have static charge built up on you?
What actually hurts you when you get electrocuted?
$500 Answer Extra
Current is what hurts you
Final Jeopardy
A 3kg sphere with a charge of +3 x 10-4 C is placed 0.7m from a 5kg
sphere with a charge of +4 x 10-7 C. Calculate all the forces present
and draw a force diagram of the forces. Which force is bigger?
Final Jeopardy Answer
Fg = 2.04x10-9N
Fe= 2.2 N
Fg = 2.04x10-9N
Fe is much greater
Fe = 2.2N