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Eighth Grade (Grade 8) Magnetism and Electricity Questions

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Grade 8 Magnetism and Electricity
Grade 8 Magnetism and Electricity
If you break a magnet in two, you get
  1. one north magnet and one south magnet.
  2. two demagnetized pieces of metal.
  3. two smaller magnets.
  4. two magnets each with only one pole.
Grade 8 Magnetism and Electricity
Grade 8 Magnetism and Electricity
                    flows in only one direction through a wire.
  1. Alternating current
  2. Direct current
  3. Voltage
  4. Electric current
Grade 8 Magnetism and Electricity
Grade 8 Magnetism and Electricity
What effect does increasing the current flowing in the wire have on an electromagnet?
  1. It increases the strength of the magnetic field.
  2. It decreases the strength of the magnetic field.
  3. It causes it to become a permanent magnet.
  4. It has no effect on the electromagnet.
Grade 8 Magnetism and Electricity
Which of the following devices produces electric current?
  1. compass
  2. electric fan
  3. generator
  4. motor
Grade 8 Magnetism and Electricity
Grade 8 Magnetism and Electricity
Grade 8 Magnetism and Electricity
Grade 8 Magnetism and Electricity
Grade 8 Magnetism and Electricity
Grade 8 Magnetism and Electricity
Grade 8 Magnetism and Electricity
North poles of magnets always attract                .
  1. negative charges
  2. positive charges
  3. south poles
  4. santa claus
Grade 8 Magnetism and Electricity
The amount of magnetic declination depends on
  1. what kind of compass you have.
  2. what time of year it is.
  3. the amount of natural magnets around you.
  4. your location on Earth's surface.
Grade 8 Magnetism and Electricity
Grade 8 Magnetism and Electricity
Grade 8 Magnetism and Electricity
Magnetic field lines
  1. never cross.
  2. cross at the north pole.
  3. cross at the south pole.
  4. cross halfway between the poles.
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