Chapter 18-Electric Potential, Capacitors and Dielectrics Flashcards
Electric Potential
Applies to the electric field only-doesn’t include any test charges. Electric potential per unit charge.
Electrical Potential Energy
Applies to the potential coming from an interaction between the field and the charge placed in the field.
Does placing the first charge in a space require work?
no
Bringing in the remaining charges one at a time until the desired configuration is finished-does this require work?
yes
Equation for Electrical Potential Energy
U=kq1q2/r
Equation for Electric Potential of a point charge
V=kQ/r
The PE is positive when
the charges have the same sign
The PE is negative when
the charges have the opposite sign
Applications of Electric Field lines
Electrostatic Precipitator, Electrostatic Air cleaner, Xerographic Copiers, Laser PrinterEKG
Equation for capacitance
c=Q/change in voltage
Parallel Plate Capacitor Equation
C=EoA/d
Applications of Capacitors
Camera Flash, Computers.
What is a circuit?
collection of objects containing a source of electrical energy such as a battery connected to elements that convert electrical energy to other forms.
Capacitors in Parallel have the same
potential difference across them
Capacitors in Parallel Equation
Ceq=C1 + C2
