- #1

enthdegree

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I'm given a strange single-diode circuit where you must find out whether or not the diode is on. See the top diagram in the linked image:

http://i.imgur.com/y1sn3.png

(Current source is indeed 1 Amp, not 1mA as the 2kΩ resistor would suggest. Please do not try to correct the initial question by flipping the diode or whatnot. I have confirmed that this is exactly the question that must be solved.)

So to solve this, I tried examining the circuit as if the diode were open.

I stuck a ground at the positive end of the voltage source for reference (I know it's a weird location but for simple circuit analysis it should be arbitrary, right?) and then looked at the voltage from that point to the positive end of V

I started again at ground, but this time went towards the negative terminal to get V

I used the voltage difference principle 'V=V

After asking a few people they say I have a sign error but I cannot find it.

Thanks for the help!

http://i.imgur.com/y1sn3.png

(Current source is indeed 1 Amp, not 1mA as the 2kΩ resistor would suggest. Please do not try to correct the initial question by flipping the diode or whatnot. I have confirmed that this is exactly the question that must be solved.)

So to solve this, I tried examining the circuit as if the diode were open.

I stuck a ground at the positive end of the voltage source for reference (I know it's a weird location but for simple circuit analysis it should be arbitrary, right?) and then looked at the voltage from that point to the positive end of V

_{d}to get V_{a}.I started again at ground, but this time went towards the negative terminal to get V

_{b}.I used the voltage difference principle 'V=V

_{a}- V_{b}` to see if the voltage across the gap was greater than 0.7V. It was not.After asking a few people they say I have a sign error but I cannot find it.

Thanks for the help!

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