MH's ideal coil and voltage question

[allcanadian]

@Magneticists

seems a reasonable deduction that follows logic. welcome to the club of having no idea.

Logically, the fact that I expressed my idea here indicates I must have one and the presumption that just because my idea may not agree with yours that it's incorrect is false. However I have no indication that you have any idea which is why grown ups need to use "their words" and convey what they mean in an intelligent manner... such as technical debate on the issue at hand.


AC

[poynt99]

Brad,

Here are two small but significant hints:

1) brush up on what it means mathematically when any number is divided by 0 (don't assume you are correct, verify it).

2) MH's question is regarding what happens at t=0, i.e. the instant the Vsource is connected (MH, please confirm).

[Magneticitist]

@Magneticists

Logically, the fact that I expressed my idea here indicates I must have one and the presumption that just because my idea may not agree with yours that it's incorrect is false. However I have no indication that you have any idea which is why grown ups need to use "their words" and convey what they mean in an intelligent manner... such as technical debate on the issue at hand.


AC

Well said

[MileHigh]

Poynt:

Here is the question again:

<<<
You have an ideal voltage source and an ideal coil of 5 Henrys.  At time t=0 seconds the coil connects to the ideal voltage source. For three seconds the voltage is 4 volts.  Then for the next two seconds the voltage is zero volts. Then for two seconds the voltage is negative three volts, and then for the next six seconds the voltage is 0.5 volts.  Then after that the voltage is zero volts.

What happens starting from t=0.
>>>

So the time frame is from 0 seconds to "beyond 13 seconds."

MileHigh

[Magneticitist]

Brad,

Here are two small but significant hints:

1) brush up on what it means mathematically when any number is divided by 0 (don't assume you are correct, verify it).

2) MH's question is regarding what happens at t=0, i.e. the instant the Vsource is connected (MH, please confirm).

OK look I have to ask you out of genuine respect for this conversation.. How did you come to ask Brad those questions? In the beginning of this thread he stated:

"My answer to this question is--you cannot place an ideal voltage across an ideal inductor.
The reason being,at T=0,when the ideal voltage is placed across the ideal inductor,the current would rise instantly to a value of infinity."

with his own words he said he understands that MH's T=0 was in reference to the initial connection of the vsource.

the issue is an ideal source being placed across 0 resistance. whether it's a coil or straight wire doesn't really matter in this context.



to answer the question of what happens the very instant the ideal vsource is connected to the ideal coil?
T=0  THE VOLTAGE CONNECTS TO THE COIL, THAT'S WHAT HAPPENS.