Re: Transistors
- From: krw <krw@xxxxxxxxxx>
- Date: Fri, 16 Nov 2007 15:47:37 -0500
In article <473c00da$0$26697$426a34cc@xxxxxxxxxxxx>, Fred Bartoli <"
"> says...
John Larkin a écrit :
On Wed, 14 Nov 2007 17:07:02 -0500, Phil Hobbs
<pcdh@xxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
Hey! This is SED--no fair being helpful!
Cheers,
Phil Hobbs
This is a nice little test to give to applicants for tech or
engineering positions:
+10V
|
|
|
c
+5V--------b
e
|
|
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1K
|
|
gnd
It's an average NPN transistor.
What's the emitter voltage? Current?
What's the base voltage?
What's the base current?
What's the collector current?
Will anything get hot?
Any other comments?
Some hot-shot resumes have been deflated by this one.
"Engineers" have said...
The base voltage is 0.6
The transistor is saturated, so collector voltage is zero.
The transistor is saturated, so emitter voltage is +10.
I haven't done this in a while, so I don't remember the formulas.
And other weird stuff.
Pitiful.
Then when you've selected the good ones (do you need really plural there
today) you can push your test further and totally confuse them with an
even harder quizz:
> open
> |
> |
> c
> +5V--------b
> e
> |
> |
> |
> 1K
> |
> |
> gnd
>
Then ask the very same questions.
>
> It's an average NPN transistor.
>
> What's the emitter voltage? Current?
>
> What's the base voltage?
>
> What's the base current?
>
> What's the collector current?
>
> Will anything get hot?
What's the collector current?
--
Keith
.
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