## Motors & Generators

1)             A stationary positive charge is located between the poles of a horseshoe magnet.  The magnetic field is directed from Up to Down.  What direction is the force on the charge?

2)             "An electron always experiences a force in an electric field, but not necessarily in a magnetic field."  Is this statement true or false?  Defend your answer.

3)             A magnetic field is directed from East to West; current flows South to North.  In which direction is the resulting force?

4)             If a conductor is moved from East to West through a magnetic field directed North to South, which way will the current flow?

5)             A wire in a generator moves from South to North in a magnetic field directed from Down to Up.  In which direction will the current flow?

6)             Current passes through a wire, causing the wire to move South.  If the magnetic field is directed from East to West, in which direction is the current?

7)             A conductor moves from North to South.  The resulting current moves from East to West.  What is the direction of the magnetic field?

8)             If a conductor is moved from South to North through a magnetic field directed East to West, which way will the current flow?

9)             Current passes through a wire from Up to Down in a magnetic field directed from West to East.  In which direction will the wire move?

10)           A wire moves from East to West in a magnetic field directed from Down to Up.  In which direction will the current flow?

11)           A current is passed through a wire, and the wire moves to the North.  If the field is directed from Up to Down, in which direction is the current that caused the force?

12)           If a conductor is moved from North to South through a magnetic field directed South to North, which way will the current flow?

13)           Current passes through a wire in a motor from Up to Down.  The wire moves from East to West.  Which direction is the magnetic field?

14)           Move a wire through a magnetic field, and you will cause a current.  If the magnetic field is directed from South to North, and the current moves West to East, which way was the wire moved?

15)           If a current moves through a wire in a magnetic field, it will cause a force on the wire.  If the force is toward the East, and the magnetic field points toward the North, which direction was the current?