Gosh....this is hard for some reason

 

We're not an exam cheating service, you've been given plenty of hints!.

__________________
PIC programmer software, and PIC Tutorials at:
http://www.winpicprog.co.uk

 

I graduated in 1975 but we did spend a few weeks studying valves.
But the only time I have used the knowledge is to amaze young techs who have never before seen a valve.

 

Real learning is frequently hard for many of us, and more importantly a test of commitment and desire to master the subject.

Good luck

Lefty

 

ok here's the thing....im gonna try again....gonna do all the quastions....gonna try to find all the answers

just check me after please.....i really wanna get good marks

 

Good strategy.

 

We're all too happy to do that, we just won't give you the answers.

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Screen name: Aloone_Jonez
And http://www.silicontronics.com, same screen name as here.

 

Quote:

i really wanna get good marks

Where does understanding the material fit in to your plan?

 

I don't want to discourage you pursuing education but I strongly urge you to consider finding another course of study. If you complete that course, you will have little useful knowledge of electronics. At least for the 21st century.

 

I know very little about valves so I can't offer you any assistance with regard to those questions.

With regard to question 14, I can see you've worked out the resistor value using ohm's law which is the correct thing to do. Unfortunately you have made a small error. You have assumed that the 12V supply will be dropped across the resistor - but what about the LED itself?
According to the question the LED drops 1.5V, so that leaves 10.5V that will be dropped across the resistor (they are in series). Re-do your calculations with this in mind and you'll come up with the correct answer.

Brian

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Electronics Test Development Engineer
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Hmmm. With regard to question 1, what is an SUS?

Brian

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Electronics Test Development Engineer
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Never heared of it, he will just have to "sus" it out for himself.

JimB

__________________
Experience is directly proportional to the value of the equipment ruined.

 

That's really bad Jim, heh!

Brian

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Electronics Test Development Engineer
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hi Jim,

I think I have managed to trawl from Google, definition of SUS, its a Silicon Unijunction Switch

http://uk.wrs.yahoo.com/_ylt=A0geump...ap2(part4).htm

Have I passed the test

__________________
Eric
"Good enough is Perfect"

PIC tutorials:
Gramo's: www.digital-diy.net/
Bill's: www.blueroomelectronics.com/

 

You failed the test, Eric.
They say a SUS is a Silicon Unilateral Switch

Has anybody ever seen one of these very old things??

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Uncle $crooge