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Eighth Grade (Grade 8) Magnetism and Electricity Questions

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Grade 8 Magnetism and Electricity
A path for electricity is                .
  1. a circuit
  2. a light bulb
  3. an ampere
Grade 8 Magnetism and Electricity
The magnetic field is strongest at the                .
  1. equator
  2. poles
  3. middile
  4. north
Grade 8 Magnetism and Electricity
Which of the following is the unit of measurement for electric potential?
  1. ohm
  2. volt
  3. watt
  4. ampere
Grade 8 Magnetism and Electricity
To pull apart is to                .
  1. magnet
  2. attract
  3. repel
Grade 8 Magnetism and Electricity
Which of the following arrows best represents the direction of the magnetic field between the ends of the U magnet?
  1. U Magnets Left[math]rarr[/math]
  2. U Magnets Left[math]larr[/math]
  3. U Magnets Left[math]uarr[/math]
  4. U Magnets Left[math]darr[/math]
Grade 8 Magnetism and Electricity
What is it called when the net forces equal 0 N?
  1. unbalanced forces
  2. push forces
  3. pull forces
  4. balanced forces
Grade 8 Magnetism and Electricity
Earth's magnetic field has
  1. an east and west pole.
  2. a north and south pole.
  3. a never changing field.
  4. none of the above.
Grade 8 Magnetism and Electricity
What does the zigzag line on the right side of the circuit schematic represent?
Schematic of a Circuit
  1. battery
  2. resistor
  3. voltmeter
  4. ammeter
Grade 8 Magnetism and Electricity
What do the parallel lines in the center of the circuit schematic most likely represent?
Schematic of a Circuit
  1. battery
  2. resistor
  3. voltmeter
  4. ammeter
Grade 8 Magnetism and Electricity
Iron is a magnetic material, but an iron nail does not behave like a magnet because                                                           .
  1. its magnetic domains are aligned
  2. it contains too few magnetic domains
  3. the atoms in the iron exert a force on all the other atoms
  4. its magnetic domains are arranged randomly
Grade 8 Magnetism and Electricity
The force between two charges increases as they get                .
  1. closer together
  2. farther apart
  3. hotter
  4. colder
Grade 8 Magnetism and Electricity
Which statement about magnetic field lines is true?
  1. they form straight lines
  2. they cross one another
  3. they have the same strength
  4. they cannot travel through air
Grade 8 Magnetism and Electricity
Magnetic fields are created by
  1. magnetic field lines.
  2. potential energy of molecules.
  3. spinning neutrons.
  4. moving electric charges.
Grade 8 Magnetism and Electricity
A coulomb measures electrical                .
  1. power
  2. charge
  3. current
  4. resistance
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