Download Chapter 19 Test Review Chapter Summary 19.1. Electric Potential

Chapter 19 Test Review
Chapter Summary
19.1. Electric Potential Energy: Potential Difference
• Define electric potential and electric potential energy.
• Describe the relationship between potential difference and electrical potential
energy.
• Explain electron volt and its usage in submicroscopic process.
• Determine electric potential energy given potential difference and amount of
charge.
19.2. Electric Potential in a Uniform Electric Field
• Describe the relationship between voltage and electric field.
• Derive an expression for the electric potential and electric field.
• Calculate electric field strength given distance and voltage.
19.3. Electrical Potential Due to a Point Charge
• Explain point charges and express the equation for electric potential of a point
charge.
• Distinguish between electric potential and electric field.
• Determine the electric potential of a point charge given charge and distance.
19.4. Equipotential Lines
• Explain equipotential lines and equipotential surfaces.
• Describe the action of grounding an electrical appliance.
• Compare electric field and equipotential lines.
19.5. Capacitors and Dielectrics
• Describe the action of a capacitor and define capacitance.
• Explain parallel plate capacitors and their capacitances.
• Discuss the process of increasing the capacitance of a dielectric.
• Determine capacitance given charge and voltage.
19.6. Capacitors in Series and Parallel
• Derive expressions for total capacitance in series and in parallel.
• Identify series and parallel parts in the combination of connection of capacitors.
• Calculate the effective capacitance in series and parallel given individual
capacitances.
19.7. Energy Stored in Capacitors
• List some uses of capacitors.
• Express in equation form the energy stored in a capacitor.
• Explain the function of a defibrillator.
Key Equations
U = qV
1 eV = 1.60 x 10-19 J
V = Ed (in a uniform E field)  E =
V
kQ
(single charge)
r
Capacitors in series:
UC 
V
(i.e. parallel plate capacitor)
d
C
Q = CV
1

Ceq
n
1
C
i 1 i
 o A
(parallel plate)
d
Capacitors in parallel:
Ceq 
n
 Ci
i 1
1 Q2
1
1
 CV 2  QV
2 C
2
2
Equipotential lines are always  to the electric field lines.
Multiple Choice (Approx 17-20)

Units for the parameters in the key equations

Equipotential lines around a point charge and between two charged parallel plates

Definition of an electron volt.

Change in potential energy moving a charge from one potential to another in joules
and in electron volts

Converting change in potential energy to change in kinetic energy

Determine the electric field between two charged parallel plates

Meaning of maximum field strength

Purpose of a capacitor

Finding charge or potential difference of a capacitor

Finding capacitance of parallel plates

Definition of a dielectric and knowing how it effects the capacitance and stored
charge

Finding equivalent capacitance of capacitors in series, parallel or a combination

Finding the energy stored in a capacitor
Problems (Approx 5-8)
 Taken from practice problems in class