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### Author Topic: Magnet Myths and Misconceptions  (Read 619984 times)

#### EMJunkie

• Hero Member
• Posts: 3322
##### Re: Magnet Myths and Misconceptions
« Reply #1050 on: January 14, 2015, 06:03:20 AM »
Just list your questions about the circuit and I will answer them to the best of my abilities.

#### MileHigh

• Hero Member
• Posts: 7600
##### Re: Magnet Myths and Misconceptions
« Reply #1051 on: January 14, 2015, 06:06:20 AM »

Since you can't answer, how about I give you the big fat clue?

i(t) = 1/L integral v(t) dt

#### MarkE

• Hero Member
• Posts: 6830
##### Re: Magnet Myths and Misconceptions
« Reply #1052 on: January 14, 2015, 06:06:31 AM »
once more variables are defined, it is easy to solve.

See, you, mileHigh and TinselKoala do things in this forum to suit yourselves! In the answer the inductor parameters would be defined so as to solve for current. People see through this behaviour!

People here can already see this!
It's trivial to solve as presently stated.

#### EMJunkie

• Hero Member
• Posts: 3322
##### Re: Magnet Myths and Misconceptions
« Reply #1053 on: January 14, 2015, 06:12:26 AM »
Since you can't answer, how about I give you the big fat clue?

i(t) = 1/L integral v(t) dt

Which gives an approximation and is certainly not by any means considered Accurate - What is wrong with you people?

Again you have proven nothing with this exercise in Blowing Hard!!!

#### EMJunkie

• Hero Member
• Posts: 3322
##### Re: Magnet Myths and Misconceptions
« Reply #1054 on: January 14, 2015, 06:14:34 AM »
Since you can't answer, how about I give you the big fat clue?

i(t) = 1/L integral v(t) dt

dt can be 1ms or one hour and give a TOTALLY different result depending on the Inductor Parameters!

WOW - You Foolish little Man!

Tripped up again by your stupidity MileHigh!

#### MarkE

• Hero Member
• Posts: 6830
##### Re: Magnet Myths and Misconceptions
« Reply #1055 on: January 14, 2015, 06:15:47 AM »
dt can be 1ms or one hour and give a TOTALLY different result depending on the Inductor Parameters!

WOW - You Foolish little Man!

Tripped up again by your stupidity MileHigh!
dt is not a unit of time.

#### MileHigh

• Hero Member
• Posts: 7600
##### Re: Magnet Myths and Misconceptions
« Reply #1056 on: January 14, 2015, 06:16:15 AM »
'dt' is the limit as you approach zero.

#### EMJunkie

• Hero Member
• Posts: 3322
##### Re: Magnet Myths and Misconceptions
« Reply #1057 on: January 14, 2015, 06:16:45 AM »
dt is not a unit of time.

Maybe a bucket of fish then?

What is dt then MarkE?

#### MileHigh

• Hero Member
• Posts: 7600
##### Re: Magnet Myths and Misconceptions
« Reply #1058 on: January 14, 2015, 06:18:11 AM »
Chris you are throwing around a lot of insults in a panic but how about results?

Is the clue helping or do you give up and want the answer?

#### MarkE

• Hero Member
• Posts: 6830
##### Re: Magnet Myths and Misconceptions
« Reply #1059 on: January 14, 2015, 06:18:59 AM »
Pencils down.  The answer to the problem as stated is readily solved as below:

I from 0s to 5s is:

I0  + 3.5A/s

I beyond 5s is:

I0  + 17.5A + 2.5A/s * (T-5s)

#### MileHigh

• Hero Member
• Posts: 7600
##### Re: Magnet Myths and Misconceptions
« Reply #1060 on: January 14, 2015, 06:21:27 AM »
The inductor parameters are "2 Henries."

Thanks Mark for the graph and the whole nine yards!!!

#### MarkE

• Hero Member
• Posts: 6830
##### Re: Magnet Myths and Misconceptions
« Reply #1061 on: January 14, 2015, 06:23:48 AM »
Maybe a bucket of fish then?

What is dt then MarkE?
dt signifies that the integral is with respect to time.  How that bears on the solution depends on the order of t in the integral.  In MH's example, the order is zero.

#### EMJunkie

• Hero Member
• Posts: 3322
##### Re: Magnet Myths and Misconceptions
« Reply #1062 on: January 14, 2015, 06:24:16 AM »
Chris you are throwing around a lot of insults in a panic but how about results?

Is the clue helping or do you give up and want the answer?

MileHigh - You're game playing and I don't like it! Its all you do.

Insults are directed at you simply because of your stupidity! Game Playing is for stupid people that have nothing better to do in their day! dt is normally considered to be a measure in time and you have again redefined the rules on the table!

You're a time waster like I said! You get paid to do it!

There is no practical benefit to being an A-Hole here! Unless you get paid to do it!

I am no longer playing your games, play your games with MarkE and TinselKoala - Try kiss n Catch first you may find a new hobby!

#### MileHigh

• Hero Member
• Posts: 7600
##### Re: Magnet Myths and Misconceptions
« Reply #1063 on: January 14, 2015, 06:26:32 AM »
Chris:

I am going to gloat a bit and you are going to eat some humble pie.  It's a little bit of poetic justice.  You should learn from this.

MileHigh

#### EMJunkie

• Hero Member
• Posts: 3322
##### Re: Magnet Myths and Misconceptions
« Reply #1064 on: January 14, 2015, 06:26:38 AM »
dt signifies that the integral is with respect to time.  How that bears on the solution depends on the order of t in the integral.  In MH's example, the order is zero.

OMG - MORE RULE Changing!

It is, its not, it is its not....

Again no ACCURATE RESULT CAN BE OBTAINED!!!!!!!

Now you two have proven it beyond a doubt!