rake666 (November 30, 1999 at 12:00 am)

I have a question for anyone. During the example for the Norton's Theorem,(at around 49:24) when Rn is needed, I came up with 83.05, but the video says 83.4 What am i doing wrong or is the video rounding off something?I've done the math a few times, and cant figure out what im missing. Thanks for the help in advance.

shankotte (November 30, 1999 at 12:00 am)

thank you professor

shankotte (November 30, 1999 at 12:00 am)

Thank you very much and greater thanks to profasor

tsniit (November 30, 1999 at 12:00 am)

Dear All, Thanks for the nice words expressed about the lectures. The Simulation programm I use is developed by me over the years and is based on Macromedia Authorware. They along with a few Do-It-Yourself kits for learning different levels of electronics are now avaialble for sale from a private company in India. The technology was transferred recently through IIT Madras.

Tenuto (November 30, 1999 at 12:00 am)

You are confusing voltage source vs voltage drop, they are different measurement.

Tenuto (November 30, 1999 at 12:00 am)

You are confusing voltage source vs voltage drop. AB is V source like a battery any measurement of current will be measured through the internal resistance. If the resistance at AB was still there it would be a v drop across that resistance and any current measurement would be through the resistance at AB.

wyzacre (November 30, 1999 at 12:00 am)

Let's say you have 2 buckets - one full of water and one empty. Water doesn't have to be flowing between the buckets for you to measure the difference in volume between them, right? The same applies to measuring the electrical potential (or VOLTAGE) between two points. The +Batt terminal is like the full bucket and Gnd is like the empty bucket. You can measure the difference in ENERGY between the two points (or VOLTAGE) even though there isn't any flow (or CURRENT) between the points.

evensteve284 (November 30, 1999 at 12:00 am)

At 24 minutes and 33 seconds into the lecture, a screen on the professors laptop comes on for a split second that says: "Authorware Macromedia". I think this might be the simulator program being used. The picture resolution is very bad, so I can't decipher what else is on the screen, but it's a strong clue. I too would very much like to know what the professor is using. Perhaps if we are very lucky, the good professor or someone else who knows will chime in with the info?

tsniit (November 30, 1999 at 12:00 am)

When we connect a voltmeter, we assume it to be an ideal device. Then its internal resistance if very high and hence no current flows through R3. In practice there will be a very small current but it can be neglected if the voltmeter is good.

evensteve284 (November 30, 1999 at 12:00 am)

I'm having a problem with Thevenin's Theorem. When the load is removed, it is said that there is no current flow through R3, so it can be ignored when calculating the voltage at points A & B. How can this be so? If you put a voltage meter at points A & B and measure voltage, isn't current flowing through R3? How else could there be a voltage reading at A & B? If you measure across B & C, I can see that you could ignore R3. I know I'm wrong but I can't understand why. Thanks.