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

Lecture: 7 Potential and Potential energy-II

Dipole system:

• E-pattern, V-pattern
• Torque on a dipole
• Flip a dipole

Two conducting spheres far apart

• Initial state: equal charges on the two spheres. Direction of flow?
• After equilibrium: Q1/Q2?
• E1/E2 -- “sharp point discharge” phenomenum

Energy stored in a system of point charge

Reminders:

• Instructor’s informal session on Friday 4-5pm. Mark your calendar.
• Please check pre-requisite and co-requisite audit-list posted outside of the lecture hall.