The rubber wrapped around wires in your home serves as a ____________.
a. insulator
b. conductor
c. open circuit
d. fuse
B - Insulator
100
Which of the following materials would NOT be attracted to a magnet?
a. iron
b. gold
c. nickel
d. cobalt
B - gold
100
A circuit is a ____________ taken by an electric current.
a. path
b. road
c. wire
d. battery
A - path
100
Static electricity can occur when ___________.
a. two objects are rubbed together
b. two objects are pushed together
c. one object sits on another object
d. one object is hung from a string
A - two objects are rubbed together
100
Electrical energy can be transformed into all of the energies below EXCEPT for _________. (Where do you NOT use electricity?)
a. heat
b. light
c. mechanical
d. muscle
D - muscle
200
Which item is a good conductor of electricity?
a. rubber
b. glass
c. copper
d. plastic
C - Copper
200
The magnetic fields of any magnet are
greatest __________.
a. around the middle
b. around the poles _
c. around only the south pole
d. around only the north pole
B - around the poles
200
A ____________ circuit prevents or stops the movement of electrical energy.
a. closed
b. thin
c. insulated
d. open
D - open
200
One example of static electricity in the atmosphere is ___________.
a. thunder
b. lightning
c. humidity
d. moon glow
B - lightning
200
_______________ discovered that electric current creates a magnetic field and a moving magnetic field creates an electric current.
a. Benjamin Franklin
b. Thomas Edison
c. Michael Faraday
d. James Madison
C - Michael Faraday
300
Which of these is the best definition of an insulator?
a. An insulator is the component that turns the circuit on and off.
b. An insulator is a material that sticks to a magnet.
c. An insulator is a material that does not allow electricity to flow through it.
d. An insulator is a material that keeps the circuit warm.
C - An insulator is material that does not allow electricity to flow through it
300
A bar magnet is placed on a table, and
a sheet of blank paper is placed over
the magnet. What could be sprinkled
on the paper to show the magnetic
field of the bar magnet?
a. salt
b. iron filings
c. sand
d. soil
B - iron fillings
300
A series circuit has ______ path(s) for the electrons to take.
a. 1
b. 2 or more
c. no
d. plastic
A - 1
300
_____________ perfected or improved the light bulb.
a. Benjamin Franklin
b. Thomas Edison
c. Michael Faraday
d. George Mason
B - Thomas Edison
300
Benjamin Franklin conducted a
famous experiment that showed
lightning was _____________.
a. a movement of air molecules
b. a magnetic field
c. an electrical discharge
d. a glowing chemical
C - an electrical discharge
400
Conductors are materials that have a _________ resistance, so electricity flows through them easily.
a. no
b. high
c. low
d. ton of
C - low
400
When we wrapped a wire around an iron nail and connected it to a battery, we created a (n) _______________.
a. electromagnet
b. magnet
c. conductor
d. electron
A - electromagnet
400
A parallel circuit has ______ path(s) for the electrons to take.
a. 1
b. 2 or more
c. no
d. plastic
B - 2 or more
400
A continuous flow of negative charges is called a (n) ____________.
a. charge
b. electric current
c. circuit
d. generator
B - electric current
400
Which of these groups contains items that could all conduct electricity to complete a circuit?
a. rubber ball, plastic comb, nail
b. paper clip, penny, screw _
c. cork, dollar bill, tweezers
d. pencil, eraser, spoon
B - paper clip, penny, screw
500
Many electrical wires are wrapped
with a plastic coating because plastic
is _______________.
a. less expensive than steel
b. more dense than copper
c. able to keep its shape
d. a good insulator
D - a good insulator
500
One way to make an electromagnet stronger is to ________________.
a. add another stitch
b. use a thinner wire
c. wind a wire around a pencil
d. wind a wire more times around a nail
D - wind a wire more times around a nail
500
What happens to the three light bulbs in a series circuit if the switch is opened?
a. All light bulbs light up.
b. The center bulb lights up.
c. The first bulb goes out.
d. All bulbs go out
D - All the bulbs go out
500
A current flowing through a wire is an example of __________.
a. a mess
b. an insulator
c. a conductor
d. electricity
D - electricity
500
Which of these would cause bits of paper to be attracted
to a comb?
a. magnetic forces
b. chemical reactions
c. static electricity _
d. heat differences