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

Lecture: 5 Applications of Gauss Law-II: Charge distribution with various symmetries

Spherical symmetry (con’d)

• A uniformly charged sphere + a conducting shell
• E vs r
• Total charge on the inner surface of the shell, q’ and that on the outer surface, q”.

Cylindrical symmetry

• A long uniformly charged rod
• Compare the r-dependences of the three symmetries

Planar symmetry

• One uniformly charged plate (assume it is large with “infinite extent”)
• Electric field inside and at the surface of a conductor
• Hints on HW2, #12.

Reminders:

• 103N lab. Begins on 1/28.
• Instructor’s informal session today. See time and place at the top.
• HW3: Several questions on ch 23 and 24, and mainly on ch 25.