1. Which one of the following situations results in a conventional electric current that flows northward?
A) a beam of protons moves eastward
B) an electric dipole moves southward
C) a beam of electrons moves southward
D) a beam of electrons moves northwa
PROBLEM 1 10 points
Two charges are placed on the x-axis. The charge at x = -3d has a charge of 2Q, while the
charge at +3d has a charge of +Q.
[2 points] (a) The net electric potential due to the two charges is zero at at least one location on
Matthias Liepe, 2012
Right-hand rule: Point the thumb of your right
hand in direction of the current. The fingers then
reveal the B-field vectors direction.
Magnetic field due to a current
Field due to a circular ar
Observations about magnetic fields
Poles of a magnet are the ends where objects
are most strongly attracted
Two poles, called north and south
Like poles repel each other and unlike poles
attract each other
Similar to electric cha