I-V graph of Diode using a C.R.O.

[cloudone]

Homework Statement

In all physics textbooks, the V-I graph for diode appears like the followings
http://211.233.39.205/phpBB2/forum_img/diode/diode-14.gif
However, when I conducted the experiment with a 1N4001 diode and 12V-AC, similar graph was found, the the graph seemed to have reflected along the y-axis.

Homework Equations

The Attempt at a Solution

sorry people, but I have no idea why it is this way. Since the x-axis should represent the voltage supplied.

What I'm thinking is that the x-axis is in the opposite direction on a C.R.O., which means more positive towards the left and more negative towards the right. Is that how a CRO works?

 

[DaveE]

What's a CRO? We'll need some more information about your test setup how are you collecting and plotting your data. 1N4001 is a simple diode, there's nothing special about it.

 

[tech99]

CRO=Cathode Ray Oscilloscope

 

[berkeman]

Sounds like he was trying to make a circuit to emulate a curve tracer with his oscilloscope.

Not to scale, this is what he should have seen...

http://forembed.com/project-curve-tracer-requirements.html
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[DaveE]

CRO=Cathode Ray Oscilloscope

LOL. I thought I was the only guy left on the planet with those. I have about 6 of them. If y'all are anywhere near Palo Alto, I'll give you one! Not kidding, I'm thinking about a local PF give away to clean up some of my unused stuff.

 

[tech99]

I have a Heathkit one which I use for everything. I could not open the graph sent in #1. Maybe it is displaying V and I on the other axes.

 

[haider]

LOL. I thought I was the only guy left on the planet with those. I have about 6 of them. If y'all are anywhere near Palo Alto, I'll give you one! Not kidding, I'm thinking about a local PF give away to clean up some of my unused stuff.

What about international? :P