Magnet Myths and Misconceptions

[MarkE]

MileHigh - Please describe what conditions the Power Supply is under during the Test, you said Variable! What is the variance due to the test and applied conditions - Not enough Information Provided.

Any coil that has a Voltage applied to it will see a Charging Time Constant!!! this is T=L/R - 5 Time Constants charge the Coil to 99.3% of its total applied charge vs the Voltage Applied. The Magnetic Field stores the Energy in the following formula: 1/2 LI^2

Current I would normally lag the Voltage by a phase angle. This would then catch up as the Time Constants move from 0.

Again you have not provided enough information as to why the Power supply shows a lower Voltage. I can only assume that its source impedance is to low for the current drawn.

Since MH did not specify the problem from negative infinity to positive infinity it is a time domain problem and no phase angle may be inferred.

[MarkE]

Before time zero the output from the power supply is zero volts.  Then for 5 seconds the output from the power supply is 7 volts.  After 5 seconds the output from the power supply is 5 volts.  This is a given.

There is no resistance anywhere in the circuit.

Resistance is futile!

[MileHigh]

Famous quotes:

All anyone here needs do is visit my site and they can see right away my site contains more about inductors than you will ever know in your entire life! So your stupidity has tripped you up yet again!

!Creo que no!

[EMJunkie]

The question has been fully defined.

So you see Chris, a circuit with a single lousy component, basically as simple as a circuit can be, and you are not capable of answering the question.

You are going to have to think about that one.  All your bluster and chest puffing and demeaning remarks, and you can't answer how a circuit works that consists of a single solitary inductor and a power supply.

MileHigh - I answered your question with MUCH better detail than you answered mine!

MileHigh - Please describe what conditions the Power Supply is under during the Test, you said Variable! What is the variance due to the test and applied conditions - Not enough Information Provided.

Any coil that has a Voltage applied to it will see a Charging Time Constant!!! this is T=L/R - 5 Time Constants charge the Coil to 99.3% of its total applied charge vs the Voltage Applied. The Magnetic Field stores the Energy in the following formula: 1/2 LI^2

Current I would normally lag the Voltage by a phase angle. This would then catch up as the Time Constants move from 0.

Again you have not provided enough information as to why the Power supply shows a lower Voltage. I can only assume that its source impedance is to low for the current drawn.

1: You did not ask for current:

Okay, here we go.

The circuit is just a variable power supply connected to a coil - that's it, nothing else.   The coil is 2 Henries.   The coil is an ideal coil with zero wire resistance.  The power supply is an ideal power supply with zero output impedance.

At the start of the test (time zero), the power supply outputs 7 volts.   After five seconds, the power supply outputs 5 volts.

Please describe what happens with this circuit starting from time zero.

2: you have changed what you are looking for half way though the test - This show what sort of person you really are!

I answered your question! Much better than you answered mine! I am right in what I answered! Anyone here can see this!

You have distorted this whole thing like I knew you would!

[MileHigh]

Since MH did not specify the problem from negative infinity to positive infinity it is a time domain problem and no phase angle may be inferred.

I am relying on the testee to make an intelligent assumption about time zero.  Or to ask an intelligent question.