Studied by 3 peopleTransistor?
a semiconductor device with three connections, capable of amplification in addition to rectification.
A transistor has three pins-
Collector, base, emitter
Two types of bipolar transistors-
NPN and PNP
What does a transistor do?
Use as a switch, for amplification, and rectification
Inductor -
A passive two terminal electrical component that stores energy in a magnetic field when electric current flow through
How is inductor measured (units)-
Henry (It's the measurement of inductance)
Inductor and capacitors Both stored energy, but different
capacitor store physically . Capacitors are plates
Inductor stores magnetically Inductors are coil wrapped
Capacitor
-is a passive electronic component that stores energy in the form of an electrostatic field
How do you safely handle a capacitor?-
make sure you do not touch the leads, handle by the body, preferably use leather gloves and pliers
How is capacitance measured?
Farads
The voltage capability is listed on the capacitor. Why?
Safety, too much voltage can cause catastrophic failure
Diodes-
a semiconductor device that essentially acts as a one-way switch for current
What is the voltage requirement for electricity to flow in a forward bias installed diode?
.7 volts allows electrons to cross the depletion zone.
What does it mean if you get a voltage reading when hooking the red probe to the striped end of the diode and hooking the black probe to the other end of the diode?
It is no longer working
Resistors
-a two terminal electronic component that resists the flow of electric current
What is a resistors job?
Limit or regulate flow of current
Where are resistors used in a circuit?
Anywhere you need you need to regulate flow of current.
AC Electricity
alternating current
Why is AC the world standard in long distance transmission electricity ?
Cost effective (Transformers are relatively cheap), high voltage, low resistance
Who is credited with the advent of AC?
Nikola Tesla
Who wanted to discredit AC as being too dangerous?
Thomas Edison
WHat is the standard frequency that AC alternates at?
50hz-60hz
What is standard household voltage in the US?
110-120 Volts
Note
Flashcard