Physics 272: Honors Physics II
Spring 2017

# Wednesday 22 February 2017: Topics to be covered in the lecture (HRW10 Chapter 24)

• continue discussion of electric potential
• electric potential and conductors
• electric potential of a point charge, of a system of point charges and of a continuous charge distribution
• electric potential energy

1. As we discussed in lecture on Monday, from a real-valued function f(x,y,z), one can obtain a conservative vector field by differentiating f: at each point in space, the x component of the vector field is minus the partial derivative of f with respect to x, the y component of the vector field is minus the partial derivative of f with respect to y and the z component of the vector field is minus the partial derivative of f with respect to z.
Do quizlet problem 1.

2. In step 1, we found that the function f(x,y,z) that corresponds to any uniform field (Fx,Fy,Fz) is f(x,y,z) = -Fx x - Fy y - Fz z
Do quizlet question 2.

3. Review the paragraph and sample problem on escape speed (HRW 9 in Section 13-6, pp. 341-342)
Do quizlet problem 3.

YOU SHOULD PREVIEW THE QUIZ QUESTIONS HERE TO BE READY TO ENTER THEM WHEN YOU START THE QUIZ IN QUIZSTAR.