Electronics Flashcards
How many valence electrons do N-type dopants have?
5
The advantage of using a higher switching speed for a transistor power supply is
Reduced size of inductors and transformers
What are three terminal names of MOSFET
Gate,drain, source
Which is the most negative terminal of a properly biased NPN transistor
Emitter
To shut off a N-channel JFET, the gate terminal must be made more _________ then the ___________ terminal
Negative , source
When testing a PNP bipolar transistor, which meter connections should display a forward voltage drop ?
Red to emitter, Black lead to base.
Which of the following transistor families is capable of the fastest switching speeds.
mosfet
A silicon diode will have a voltage drop of ———— when forward biased
0.7
Transistor type with a insulated gate
D-mosfet
When testing a NPN bipolar transistor, which meter connections should display a forward voltage drop ?
Red to base, black lead to emitter
To turn on a N-channel E-mosfet, the gate terminal must be made more ______ then the _______ terminal
Positive, source
A BJT has a gain of 30 has 50mA flowing into its base terminal. How much current will flow to emitter ?
1.55A
An N channe JFET is tested with a multimeter and measures .7V between gate and source, and O/L with the leads reversed. The transistor is ???
Working normally
A BJT has a base current of 220uA and a collector current of 40.7mA what is Beta value ?
185
In P-type silicon, the majority of current is conducted by ??
Holes
The N-channel JFET is tested with a multimeter and measures O/L between gate and source and O/L with the leads reversed, the transistor is ??
Failed open
Which transistor type operates like a normally closed switch ?
JFET
A BJT is used to switch 24V to a 200ohm load. The base current supplied from a .5mA signal. What is the required beta for the transistor?
240
How many PN junctions are in a Bipolar Junction transistor ?
2
The middle layer of a bipolar junction transistor is called ?
Base
An N-channel mosfet is tested and measures OL between gate and source, and OL with the leads reversed the transistor is ________?
Working normal
If the anode of a diode is more positive then the cathode , the diode is _______?
Forward biased
