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Electric Fields and Circuits

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  • Name 3 forces that can cause motion without contact.
    Gravity, Magnetic fields, and Electric fields
  • What would prevent an electric current in a circuit and stop any energy transfer from happening?
    opening the switch or disconnecting the wire
  • As the electric current through a wire increases, what will happen to the magnetic strength?
    The magnetic field will get stronger
  • If a light bulb is powered by a single D-cell. What happens if two D-cells connected end-to-end are used?
    The light bulb will light up brighter
  • What is an electric field?
    An area that surrounds electrically-charged particles and exerts force on all other charged particles in the the field.
  • Both magnetic fields and electric fields are affected by mass and distance. T/F
    True
  • If you bring a positively charged balloon near another balloon and they are attracted to each other what can you claim about the charge on the second balloon?
    The second balloon has a negative charge
  • A material through which electrons can move easily is a _____.
    Conductor
  • As you get closer to an electric field what happens to the strength?
    The electric field gets stronger the closer you get to it.
  • What happens when you close the switch in a circuit?
    Energy will flow
  • Why isn't the light bulb lit up?
    The switch in opened, the flow of energy has been interupted.
  • What does this picture show?
    Opposites attract
  • The opposite poles of a magnet or called the North and South poles. What is used to describe the opposite parts of an electric field?
    Positive and negative particles or electrons and protons
  • What does this picture represent?
    Electromagnet
  • What is a benefit of an electromagnet?
    Can be turned on and off, can be made stronger.
  • In this circuit what is the source of energy?
    The battery
  • When two negatively charged objects come close to each other what will happen?
    They will repel each other.