o Course homepage, Ongoing Lectures, TT-system 

• Instructor’s weekly informal sessions:

Tu 3:30-4:20, RAS 213 ; Fri 4-5, RLM 5.104

Lec. 23 Chapter 30-II: Applications based on magnetic force.

Circular motion:

· r, T and f (or w)

· Cyclotron

· Helical motion

· Mass spectrometer: Text problem 18, HW8 Q10-11. (Please read it on your own)

Loop-magnet equivalence:

· Dipole field pattern.

· Net force = 0.

· Torque = m x B

Hall effect: Sec 30.5

· Sign of V_Hall

· Magnitude of V_Hall

Reminders:

• If there is request by 3 or more students, I will hold an instructor’s informal section today. See time and place above.
• Midterm course instructor’s survey: Please do it at your earliest convenience.

o The survey is in the Blackboard.

o Multiple entries are allowed. During each session, make sure you save your responses.

o Caution: Only one submission is allowed. So only after you are sure that you are completely done, will you click the submit button.