Principles, Circuits And Protection Devives Flashcards
Ohms Law
1 volt is required to move 1 amp through 1ohm of resistance
If voltage is held constant in a circuit
Amperage increases if resistance decreases
Amperage decreases if resistance increases
If resistance is held constant in a circuit
Amperage increase if voltage increases
Amperage decreases if voltage decreases
If amperage is to remain the same in a circuit
Voltage must increase if resistance increases.
Voltage decreases if resistance decreases
Alternating current
Current flow that continuously changes direction and polarity.
Amperage
Current flow
Quantity of electrons
Conductor
Material that easily allows electricity to flow through it.
Direct current
Movement of current that flows in one direction.
Electrical resistance
Reduces voltage and amperage in a circuit
Conventional theory
Positive to negative current flow
Electron theory
Negative to positive current flow
Hertz (Hz)
Electrical frequency measurement, cycles per second.
Insulator
A material that holds electrons tightly, prevents electron movement.
Ex: wire insulator, shrink tube
Inverter
A device that changes DC into AC.
Load
A device in an electrical circuit with resistance.
MOSFET
A field effect transistor made with metal-oxide.
N-Type material
Semiconductor material, holds small amount of extra electrons.
Polarity
The state of charge, positive or negative.
P-Type material
Semiconductor material, electron deficiency. Can hold additional electrons.
Resistor
A component designed to produce electrical resistance.
Need resistance for current flow.
Semiconductor
Has properties of both conductors and insulators.
Can switch back and forth between each state.
Semiconductor
Has properties of both conductors and insulators.
Can switch back and forth between each state.
Sin wave
AC wave form. Constantly changing from positive to negative.
As seen on a graph, function of time.
Voltage
Electrical pressure
Think of a compressor, when filling a tire with air.
Circuit breaker
Circuit protection device. Will open preventing excessive current flow.
Resettable.
Field effect transistor
a type of transistor that uses an electric field to control the flow of current in a semiconductor.
Type 1 circuit breaker
Automatically resets
Type 2 circuit breaker
Non cycling circuit breaker
Type 3 circuit breaker
Manual reset
