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Instructor’s informal sessions:

• Tu 3:30-4:20pm, RAS 213.
• Fri 4-4:50pm, ECJ 1.204.

Lecture: 6 (iq3) Potential and Potential energy

• Change in the PE of the q from A to B = Work required to bring it from A to B.

o DU=U_B-U_A= - qEê Ds

• The potential at r due to Q
• V(r)=kQ/r
• The electric influence of Q:
• E-pattern and V-pattern

• Total energy of n-point-charge system

Reminders:

• Instructor’s informal session tomorrow (overview of chapter 25). See time and place at the top.
• HW3 includes some problems which make use of the concepts of Ch 22-24. You need to review these chapters.
• Please check pre-requisite and co-requisite audit-list posted outside of the lecture hall. Remember Wed. Feb4 is the deadline. After this date the “auto-drop” goes into effect.