LT 3-5 Flashcards

1
Q

What is the difference between a zener diode and a normal diode

A

A Zener diode is engineered to have a set break down voltage when hooked up reverse biased Whereas a normal diode would be destroyed once it hit it PIV

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is the material that zener diodes usually made of

A

Silicon

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

How can you tell a zener diode apart from a normal diode physically

A

you cant, only by looking up the code on the diode, other than that they look identical

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

How does a zener diode behave when hooked uo in forward bias

A

It acts like a normal diode and has a 0.7v drop across it

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is Zener Voltage

A

the constant voltage that a zener diode maintains over different currents when hooked up in reverse bias

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

When does a Zener diode regulate voltage

A

Only when its reverse biased and its input voltage is greater than it Zener voltage

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What does LED stand for

A

Light Emitting Diode

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

How do Silicon and germanium Diode Release their extra energy

A

In the form of Heat

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What are Led made of

A

gallium arsenide

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Why is Gallium Arsenide used in LED’s

A

It releases extra energy in the form of light

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is the current range for LED’s

A

20-50 mA

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is the PIV for LED’s

A

6v

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Different color LED’s have different ___________

A

Voltage drops

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

LED’s have (higher or Lower) voltage drops then a silicon diode

A

Higher

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

LED’s need to be (Forward or Reverse) Biased

A

Forward Biased

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Photo Diodes need to be (Forward or Reverse) Biased

A

Reverse Biased

17
Q

How many amps do photo diodes let in per LUX

A

20 nanoamperes per lux​