1. Reading Quiz 2. What is the SI unit of capacitance? Capaciton Faraday
Hertz
Henry
Exciton
What quantity is represented by the symbol ?
Electronic potential
Excitation potential
EMF
Electric stopping power
Exosphericity
Answer: C

2. is always perpendicular to an equipotential surface.
3. The electric field
is always perpendicular to an equipotential surface.
is always tangent to an equipotential surface.
always bisects an equipotential surface.
makes an angle to an equipotential surface that depends on the amount of charge.
4. This chapter investigated
parallel capacitors
perpendicular capacitors
series capacitors.
Both a and b.
Both a and c.
Answer: E

3. What quantity is represented by the symbol ?
Electronic potential
Excitation potential
EMF
Electric stopping power
Exosphericity

4. What is the SI unit of capacitance?
Capaciton
Faraday
Hertz
Henry
Exciton

5. The electric field
is always perpendicular to an equipotential surface.
is always tangent to an equipotential surface.
always bisects an equipotential surface.
makes an angle to an equipotential surface that depends on the amount of charge.

6. This chapter investigated
parallel capacitors
perpendicular capacitors
series capacitors.
Both a and b.
Both a and c.

7. Finding the Potential from the Electric Field
The potential difference between two points in space is
where s is the position along a line from point i to point f. That is, we can find the potential difference between two points if we know the electric field.
We can think of an integral as an area under a curve. Thus a graphical interpretation of the equation above is

8. EXAMPLE 30.2 The potential of a parallel-plate capacitor

9. EXAMPLE 30.2 The potential of a parallel-plate capacitor

10. EXAMPLE 30.2 The potential of a parallel-plate capacitor

12. Finding the Electric Field from the Potential
In terms of the potential, the component of the electric field in the s-direction is
Now we have reversed Equation 30.3 and have a way to find the electric field from the potential.

13. EXAMPLE 30.4 Finding E from the slope of V
QUESTION:

14. EXAMPLE 30.4 Finding E from the slope of V

17. Exam 1 Review Chapters 26 – 30 Up to and including section 30.4
The exam won’t cover sections to the end of the chapter
The exam will cover
Field lines and surfaces of equipotential for different charge configurations
Force and Electric Field of point charges
Potential and Potential Energy of point charges
Using Gauss’ Law to determine something about field or charge

18. Group Problems Start Ch 29 HW
Chapter 30 HW may be on exam (topics up to and including those covered in Sections 30.1 – 30.4)