1. Can you set a resting electron into motion with a magnetic field? With an electric field? Explain. 2. A particle of mass m and charge q moves in a circular path in a magnetic field B. Show that its kinetic energy is proportional to , 2 r the square of the radius of curvature of its path. Also Show that the angular momentum of the particle is 2 L = qBr about the center of the circle. 3. A charged particle is moving in a circle under the influence of a uniform magnetic field. If an electric field that points in the same direction as the magnetic field is turned on, describe the path the charged particle will take. 4. Why will either pole of a magnet attracts an unmagnetized piece of iron? 5. How could you tell whether moving electrons in a certain region of space are being deflected by an electric field or by a magnetic field (or by both)?.

 1. Can you set a resting electron into motion with a magnetic field? With an electric 

field? Explain.

2. A particle of mass m and charge q moves in a circular path in a magnetic field B.  Show that its kinetic energy is proportional to  , 2 r the square of the radius of  curvature of its path. Also Show that the angular momentum of the particle is  2 L = qBr about the center of the circle. 

3. A charged particle is moving in a circle under the influence of a uniform magnetic  field. If an electric field that points in the same direction as the magnetic field is  turned on, describe the path the charged particle will take. 

4. Why will either pole of a magnet attracts an unmagnetized piece of iron? 

5. How could you tell whether moving electrons in a certain region of space are being  deflected by an electric field or by a magnetic field (or by both)?.