Final Flashcards
Series
Resistors - RT + R/1 + R/2 + R/3….
Capacitors - 1/CT = 1/C1 + 1/C2 + 1/C3
Parallel
Resistors - 1/RT = 1/R1 + 1/R2 + 1/R3
Capacitors - CT = C1 +C2 + C3 …..
What moves electrons?
Voltage - Volts (E)
Electrical Pressure
EMF (Electromotive Force)
Potential Difference
Resistance (R)
Conductors (Free electrons; so they move easily.)
Insulators
AC
Alternating Current
DC
Direct Current
Meters
Volts
Ohms
Current
Types of Circuits
- Open (No path)
- Short - (No load)
- Complete
A. Load
B. Power Source
C. Path (from and to)
Rules for OHMS before taking readings?
- Power off
2. Isolated
Circuit Laws
E = I X R P = I X E
Series Laws
ET = E1 + E2... IT = I1 = I2... RT = R1 + R2...
Parallel Laws
ET = E1 = E2... IT = I1 + I2... 1/RT = 1/R1 + 1/R2...
Coils
Relay - Operate switches
Solenoids - Operate mechanical (valve)
Transformers - Energizes another coil
5 to 1 Ratio
50 Volts primary
10 Volts secondary
100 Turns
100 to 1
120 Volts = 12000 turns
Motors
Motion
Magnet strength depends on:
- Number of turns
- Current flow
- Type of material
Wiring
Switches - Series
Loads - Parallel
Never jumper?
!!!!!!!!LOADS!!!!!!!!
Jumping?
!!!!!!!!Switches Only!!!!!!!!
Opposition
Slows down current flow.
Impedence
- Resistors
- Inductance Reactance
- Capacitance Reactance
Power Factor
True Power
Apparent Power
Efficiency of motor
(P = I X E) What is P stand for?
Power Factor
True Power
Horse Power
One horse power (H.P.) measured in watts?
746 watts
T stat stands for?
Thermostat (Any volts)
Thermostat wire colors?
R = Power W = Heat Y = Cool G = Fan (24 volts)
Ohms Law
E
I | R
E = I X R (Voltage is Amperage times Resistance)
E in Ohms law stands for?
Volts or Voltage
I in Ohms law stands for?
Current measured in amps.
R in Ohms law stands for?
Resistance or Ohms(Higher the resistance the less the flow will be.)
P stands for?
Power measured in watts.
Power Formula
P
I | E
What is electric voltage measured in?
Volts
How is a value of electrical voltage labeled?
V
What symbol is used for electrical voltage in algebraic forumula?
E
What is electrical power measured in?
Watts
How is a value of electrical power labeled?
P
What symbol is used for electrical power in algebraic formulas?
P
What symbol is used for electrical current in algebraic formulas?
I
What is electrical resistance measured in?
Ohms
How is a value of electrical resistance labeled?
Ω
What symbol is used for electrical resistance in algebraic formula?
R
Which of the following terms is best defined as the opposition to flow of electrons in an electrical conductor?
Resistance
Which of the following terms is best defined as the flow of electrons in an electrical conductor?
Current
Which of the following terms is best defined as the rate electrical energy is converted into another form?
Power
Women What
Are | Virgins Are | Volts
Virgins Volts Are | Rare Are | Resistance
Watts
Amps | Volts
Volts Amps | Resistance