Re: kids these days

On Tue, 01 Oct 2024 06:11:49 GMT, Jan Panteltje <alien@comet.invalid>
wrote:

On a sunny day (Mon, 30 Sep 2024 08:24:38 -0700) it happened john larkin
<JL@gct.com> wrote in <7bglfjtll1os4g6pfqhf1i7jl0acmrvlqv@4ax.com>:
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On Mon, 30 Sep 2024 11:13:56 +0100, Cursitor Doom <cd@notformail.com>
wrote:
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On Mon, 30 Sep 2024 05:15:02 GMT, Jan Panteltje <alien@comet.invalid>
wrote:
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On a sunny day (Sun, 29 Sep 2024 10:36:26 -0700) it happened john larkin
<JL@gct.com> wrote in <kb3jfjpejs47hqjd00fis20eog8de19ae8@4ax.com>:
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I wouldn't hire someone who complicates a simple question into
paralysis.
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I draw a 10 volt battery connected to two resistors, 9K in series with 1K.

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The problem there is 'draw', no reality.
The battery will have an internal resistance, maybe discharged too.
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What's the voltage across the 1K?

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I hired a 3-month intern a month ago who failed the test. He said 9
volts. I hired him anyway and fired him as an intern on Friday. He's
full time now. He's mostly a software engineer. I'm teaching him basic
electronics now.

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Well, that is OK.
But needs experimenting, building circuits, else all vaporware.
Same with software, write it, test it, else just imagination...
It may not be / work for everybody..
Some run for US precedent..
When I have to believe the crap trump puts out these days (about Iran for example)
4 sure (or maybe even 00 sure <where 00 is the symbol for infinite> ) we will have
WW3 no matter who is winning the electtions.
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I dream of some day finding a kid who gets the voltage divider right
and has something intelligent so say about the next test, an NPN
emitter follower.

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Ge or Si?

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John mentioned a Vb of 0.6V so the 'student' is expected to know it's
silicon. And of course, it's a Vbe of 0.6V and that distinction seems
to trip up a lot of young folks, it seems. The Vb is 5. Once they get
that straight, the rest of it falls into place easily enough. Should
take < 30s for someone to figure out - and hopefully <<!

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No, I said that one EE grad claimed that Vb (not Vbe) would be 0.6
volts to ground.
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Can anyone here say about what the base and emitter voltages actually
are? Collector current?
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+10 supply, two 10Ks making a divider into the base, 1K emitter to
ground, typical small silicon NPN.

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Depends on the beta, if YOU assume beta is huge ( >=300 or so)
then base will be at about 5 V, emitter at about 4.3 V
current will then be 4.3 / 1000 or 4.3 mA
(I always go for .7 V Vbe for some reason)
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Extra credit: anything else to say?

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For a lower beta (may be as low as 10 for for example a power NPN)
you need to take into account the base current that will among other things
decreae the base voltage followed by a lower emitter voltage...
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Are credits chocolate?

Yes.

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