Electricity and Magnetism

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Electricity and Magnetism
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• 1. In the filament of a light bulb, as shown in
  the drawing,

• A. electrical energy is changed into light energy
  only.
• B. heat and mechanical energy.
• C. light and heat energy.
• D. light and mechanical energy.

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• 2. A toaster is plugged into the wall outlet
  because electricity is needed when it is turned
  on. The coils inside the toaster change the
  electricity to heat energy, but another type of
  energy is also produced. What is that type of
  energy?

• F) mechanical
• G) sound
• H) light
• I) magnetic

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• 3. A lamp is plugged into a wall outlet because
  electricity is needed when it is turned on. The
  electrical energy is turned into _____________
  energy.

• A) mechanical
• B) sound
• C) light
• D) magnetic

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• 4. Kira wanted to listen to music on her new CD
  player. She plugged it into the wall, turned it
  on, and pressed play. Which best describes what
  happened?

• F) Electrical energy is changed into sound
  energy.
• G) Heat energy is changed into sound energy.
• H) Chemical energy is changed into sound energy.
• I) Mechanical energy is changed into sound
  energy.

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• 5. Which is an example of current electricity in
  action?

• A. You get a shock from a doorknob after petting
  your dog.
• B. Your hair becomes fly-away after using a
  hard rubber comb.
• C. Two sweaters stick to each other when taken
  out of the dryer.
• D. Your toaster heats up when you push down the
  button to make toast.

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• F) The rubber keeps her hands dry.
• G) The rubber acts as an insulator.
• H) The rubber keeps her hands warm.
• I) The rubber acts as a conductor.

• 6. Which best describes why the electrician is
  wearing rubber gloves?

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• 7. Seven light bulbs are connected to one
  electrical socket. When one bulb burns out, the
  others continue to shine. Which is true about the
  bulbs?

• A) They are part of a parallel circuit.
• B) They are part of a series circuit.
• C) They are part of an open circuit.
• D) They are part of a circuit breaker.

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• A) Light
• B) Motion
• C) Static electricity
• D) Magnetic energy

• 8. When electricity passes through the filament
  of a light bulb, it is changed to

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• 9. What is the purpose of the wire in an
  electrical circuit?

• A) To pull the electrical charge out of the power
  source
• B) To carry the electrical charges from the bulb
  to the power source
• C) To connect one power source to another power
  source
• D) To carry the electrical charge from the power
  source to the bulb

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• 10. Which of the following describes what happens
  in an open circuit?

• F) If one bulb turns out, others stay on.
• G) Electric current does not flow through the
  circuit.
• H) If one bulb burns out, all others go out also.
• I) Electric current does not flow through the
  circuit

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• 11. Which of the following describes what happens
  in a closed circuit?

• A. If one bulb turns out, others stay on.
• B. Electric current flows through the circuit.
• C. If one bulb burns out, all others go out also.
• D. Electric current does not flow through the
  circuit

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• 12. What is the purpose of the switch in an
  electrical circuit?

• F. To connect the load and the power source
• G. To transfer current electricity to the load
• H. To turn current electricity on and off
• I. To change a series circuit to a parallel
  circuit

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• 13. Which of the following describes what happens
  in a parallel circuit?

• A. If one bulb turns out, others stay on.
• B. Electric current flows through the circuit.
• C. If one bulb burns out, all others go out also.
• D. Electric current does not flow through the
  circuit

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• 14. How many path (s) are in a series circuit for
  electric current to travel from the battery and
  back to the battery?

• F) 1
• G) 2
• H) 3
• I) 4

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• 15. Rosa wanted to use strings of old holiday
  lights to decorate her booth at the schools Food
  Fair. One string of lights did not work. She
  had to remove each bulb and test it to find out
  which ones were burned out and then replace them.
  What did she learn about this string of lights?

• A. They only light when the circuit is open.
• B. They were wired in a parallel circuit.
• C. They were wired in a series circuit.
• D. They only light when the bulbs are the same
  color.

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• 16. Jerry noticed that there were two lights
  burned out in his classroom. All the other
  lights were still on. From this observation
  Jerry inferred that the lights in this classroom
  were wired

• F) in a series circuit.
• G) in a parallel circuit.
• H) in a closed circuit.
• I) in a static circuit.

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• 17. Susan was doing a safe use of electricity
  survey of her room. What did she see that is a
  possible safety hazard?

• A. computer and printer plugged into a power
  strip
• B. unplugged and cool hair dryer lying on the bed
• C. unplugged portable electric heater sitting in
  the corner
• D. unplugged vacuum cleaner with a worn cord in
  the closet

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• 18. Which of the following describes what happens
  in a series circuit?

• F) If one bulb turns out, others stay on.
• G) Electric current flows through the circuit.
• H) If one bulb burns out, all others go out also.
• I) Electric current does not flow through the
  circuit

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• 19. What is a disadvantage of a series circuit?

• A) The bulbs in a series circuit will give off
  more heat than the same bulbs in a parallel
  circuit.
• B) If one bulb burns out, then none of the others
  will light up.
• C) It is difficult to tell which path an electric
  charge is following in a series circuit.
• D) Only one bulb can be connected in a series
  circuit.

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• 20. What is true about the flow of electric
  charges in a parallel circuit?

• F. It has two or more paths to follow.
• G. It can flow through an open circuit.
• H. It flows more slowly than in a series circuit.
• I. It flows in different amounts to different
  bulbs in the circuit.

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• 21. What is the metal center of an electromagnet
  called?

• A. The current
• B. The wire
• C. The coil
• D. The core

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• 22. Look at the picture of a circuit a student
  made. Which is the best prediction about what
  will happen?

• F. The bulb is connected to the battery.
• G. This is not a complete circuit
• H. The bulb will not light.
• I. The battery is dead.

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• 23. In what kind of circuit does the electrical
  current flow in one path?

• A. parallel
• B. series
• C. closed
• C. complete

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• 24. Which electromagnet will be the strongest?

• F. An electromagnet with 40 coils
• G. An electromagnet with a permanent magnet
  attached
• H. An electromagnet with a metal core
• I. An electromagnet with 60 coils

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• 25. Which of the following best describes an
  insulator?

• A. It transfers electricity poorly.
• B. It is made of metal.
• C. It gets hot very easily.
• D. It can not hold energy.

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• 26. The lights in a house are not working
  properly. Every time one light switch is turned
  on, all the light in the house turn on. When it
  is turned off, each light also turns off. Which
  best describes the problem?

• F. The house has a parallel circuit when it
  should have a circuit breaker.
• G. There are no series circuits in the house.
• H. The house has a series circuit when it should
  have a parallel circuit.
• I. The house can not support electrical current.

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• 27. What will be attracted to the south pole of
  the bar magnet shown.

S
N

• A. Only the north pole of another magnet
• B. Only the south pole of another magnet
• C. Anything made of iron, and the north pole of
  another magnet
• D. Anything made of iron, and the south pole of
  another magnet

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• 28. Which of the following is a good conductor of
  electricity?

• F. rubber
• G. wood
• H. copper
• I. glass

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• 29. Magnetic force is produced by

• A. A metal and a nonmetal coming together
• B. Static electricity
• C. Two nonmetals coming together
• D. Two poles attracting or repelling each other

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• 30. Jeff made the circuit in the drawing. What
  does he need to add to complete the circuit?

F. Another bulb G. Another battery H. A switch I.
A magnet
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• 31. A student was testing an electromagnet. She
  made it from wire, a battery, and a nail. Which
  observation can she make about the electromagnet?

• A. A permanent magnet provides a stronger
  magnetic field
• B. A permanent magnet has less magnetism force
• C. Electromagnets are only magnetic when electric
  current flows
• D. Electromagnets are not magnetism when
  electricity current flows.

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• 32. A student predicted that she could increase
  the strength of a magnet by stacking several
  magnets together. What should the student do to
  best test her prediction?

F. Write about her magnets in her lab notebook G.
Describe her observations about the magnets H.
Conduct multiple trails and draw conclusions I.
Construct a graph using another students data
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• 33. Which is the safest ways to conduct an
  experiment with electrical circuits?

• A. Do not conduct the experiment indoors.
• B. Do not conduct the experiment with a power
  source
• C. Do not conduct the experiment near water
• D. Do not conduct the experiment with wires.

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• 34. Which of the following is needed to make an
  electromagnet?

• F. Electric current
• G. Permanent magnet
• H. Piece of wood
• I. Compass