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• Instructor’s weekly informal sessions: Tu 3:30-4:20, RAS 213 ; Fri 4-5, RLM 5.104

Lecture: 6 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 function at r, V(r), due to Q
• V(r)=kQ/r
• The electric influence of Q:
• E-pattern and V-pattern
• A charged conducting sphere (Example 7. Fig 25.18,)
• Two concentric charged conducting spheres ( Similar approach is used in HW3: Q14)

• A uniformly charged insolating sphere: (Example 4. Eq(25.32), Fig25.13)

Reminders:

• Instructor’s informal session tomorrow. See time and place at the top.
• HW3 includes some problems in Sec 23.4 and Sec 23.5 please re-read these two sections on your own. Some issues related to these two sections will be discussed in the next lecture.
• Please check pre-requisite and co-requisite audit-list posted outside of the lecture hall.