Electromagnetic Induction

What happens to a "current carrying wire" in a magnetic field?

• It catches fire

• It moves

• It rotates

• It becomes more efficient

When a "current carrying wire" in a magnetic field moves what does it create?

• current

• charge

• voltage

• force

At what angle to the magnetic field does the current carrying wire move?

• the optimum angle

• 100 degrees

• 45 degrees

• Right angles

In which of the following situations is a voltage generated?

• Wire moves parallel to the magnetic field

• The wire does not move

• The wire moves at 90 degrees to the magnetic field

• The wire moves at any angle to the magnetic field

What does the polarity of a magnet mean?

• The size of the poles on a magnet

• The arrangement of the domains inside the magnet determine its polarity from North to South

• The size of the magnetic field generated by the magnet

• The strength of the electric field of the magnet

What happens if you change the direction of the magnets either side of the "current carrying wire"?

• The wire rotates on its axis

• The voltage generated is increased

• The current in the wire is increased

• The current in the wire is induced in the opposite direction

A "current carrying wire" moving in a magnetic field induces a voltage. What does the amount of this voltage depend on?

• Strength of the magnetic field

• The thickness of the wire

• The speed the wire moves

• Wrapping the wire into a coil