Transistor homework question
- Thread starter electo101
- Start date
What is the value for Alpha and VBE?
If Alpha = 1 then you can say that IE and IC are equal.
With that 25mA, you can find VC just by using KCL. It should be
10V-VC/270 = 25mA
VC = ......
From there you can use the other formula
VCE= VC - VE
If VBE = 0.7V....
-----------------
VB = 5V this is the base volatge it already have a +5V volatage source connected to it.
VBE = VB - VE
0.7 = 5V - VE
VE = 4.3V
-----------------
If Alpha = 1 then you can say that IE and IC are equal.
With that 25mA, you can find VC just by using KCL. It should be
10V-VC/270 = 25mA
VC = ......
From there you can use the other formula
VCE= VC - VE
If VBE = 0.7V....
-----------------
VB = 5V this is the base volatge it already have a +5V volatage source connected to it.
VBE = VB - VE
0.7 = 5V - VE
VE = 4.3V
-----------------
Attachments
| Thread starter | Similar threads | Forum | Replies | Date |
|---|---|---|---|---|
| T | Using npn transistor as a switch to ground | Analog & Mixed-Signal Design | 5 | |
| A | Localization of first and second poles in this circuit | Homework Help | 5 | |
| Z | Problem with transistor | Homework Help | 16 | |
| J | Help with homework-Transistor as battery charger | Homework Help | 7 | |
| B | BJT transistor homework | Homework Help | 3 |
