Magnet Myths and Misconceptions

[EMJunkie]

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.

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.

[EMJunkie]

I gave you the real short answer - the impedance of the medium determines the velocity.

No you did not give me the answer as to why. You gave me a verification of the drop not why!

[MileHigh]

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.

[EMJunkie]

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.

So if I understand you correctly, then I have answered your question!

Lets hear your desired answer?

[MileHigh]

So if I understand you correctly, then I have answered your question!

Lets hear your desired answer?

C'mon Chris, get real please.  Please post your answer.