Trade Concepts Flashcards
What is the formula to find circumference?
2•pi•r
What is the formula for CMA?
diameter^2
d is mils. Mils is 1/1000
What is the formula for SMA?
L•W or CMA•0.7854
What is resistance when given CMA?
R = K•L / CMA
K is constant
L is measured in feet
What is the constant resistance value for copper?
10.4
What is the constant resistance value of aluminum?
17
What is the conversion for ft to meter?
1 foot = 0.305 meters
What is for formula to find P, when given I and R?
I^2•R
What is the formula to find I when given P and R?
Square root of P/R
What is the formula to find voltage when given P and R?
Square root of P•R
What side of a diode is more positive?
Triangle side
What side of a diode is more negative?
Flat side
How is a diode connected in reverse bias?
When the anode (triangle side) is connected to negative.
When a diode is acting as an open switch, it is in what bias?
Reverse
What will a voltmeter read on an open in a series circuit?
Source
When a diode is in forward bias, what will be the voltage drop across it?
0.7V
What does an ohmmeter read on a diode when it is in reverse bias?
High resistance
What does an ohmmeter read on a diode when it is in forward bias?
Low resistance
How will a diode be connected in a circuit when it is in forward bias?
The cathode (flat part) will be connected to negative.
In a transistor, the lead associated with the arrow is the ______
Emitter
In a transistor, the lead associated with no arrow is the _____
Collector
In a transistor, the arrow points towards the ____
N in a PNP or NPN junction
In a transistor, the load is connected to the _____
Collector
In a transistor, which is the common?
Emitter