Study

Electricity and Magnetism

  •   0%
  •  0     0     0

      Back   Restart
  • The Earth's core is made up of liquid magnetite. ( True or False ) Correct the false ones.
    False. It is made ofliquid iron.
  • Permanent magnets never lose their ___.
    magnetism
  • The mineral magnetite is a ___.
    natural magnet.
  • The earth's magnetic poles are in exactly the same place as its geographical poles. ( True or False ) Correct the false ones.
    False. They are near the geographical poles but not exactly in the same place.
  • The earth's magnetic field protect's us from harmful cosmic radiation. ( True or False ) Correct the false ones.
    True
  • The earth's atmosphere ___ us from solar radiation.
    protects
  • The compass has a magnetised needle that always points north and a diagram on its face, called ___.
    rose
  • It is the relationship between electricity and magnetism.
    Electromagnetism
  • It is an instrument used for finding your way.
    compass
  • It attracts certain metals, such as iron, nickel and cobalt.
    Magnets
  • We can build ___ magnets for use in industry.
    artificial
  • They are objects that act like magnets when an electrical current psses through them.
    Electromagnets
  • Magnets are devices that ___ some types of metals.
    attract
  • If we put wo magnets together, their identical poles ( N and N ; S and S) will ___ each other.
    repel
  • The earth's core acts as a giant magnet, creating an enormous magnetic field. ( True or False ) Correct the false ones.
    True
  • They are naturally magnetic pieces of magnetite.
    lodestones
  • Copper is a metal, but it has a ___ magnetic force.
    weak
  • All magnetic materials are ___.
    metallic
  • If we put two magnets together, their opposite poles ( north and south ) will ___ each other.
    attract
  • Non-metallic materials, such as wood, cannot be ___.
    magnetic
  • It is the ability to attract megnetic materials.
    Magnetism
  • Magnetism is created when electricity flows through ___.
    magnetic metals
  • Induced magnets only have a ___.
    temporary magnetic force
  • All magnets have a north and a ___ pole.
    south
  • Artificial magnets are made by ___.
    people
    • Your experience on this site will be improved by allowing cookies.