Find Maximum Current

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greatwhiteshark

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May 8, 2005
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The equation governing the amount of current I(in amperes) after time t(in seconds) in a single RL circuit consistiing of a resistance R(in ohms), an inductance L(in henrys) and an electromotive force E(in volts) is:

I = E/R [1 - e^-(R/L)t]

If E = 120 volts, R = 10 ohms, and L = 5 henrys, what is the maximum current?
 
Can you draw the graph?
Do you know anything about exponentials?
What happens as t increases?
What happens as t decreases to zero (0)?
Should we consider values for t < 0?
Do we know that R, L, and E are positive? Yes, the problem statement gave us that.
 
tkhunny

Did you read my private message sent yesterday??????
Please, stop answering my questions. You like to put students down with your Einstein knowledge of math. I do NOT place my questions here to be insulted. Do you know this or do you know that?
If I did Einstein, would I ask anyone here for help???????

PLEASE, skip my questions. I want patient tutors to reply. Stop answering my questions! OKAY??? Got it????
 
Sadly, I inadvertently deleted your email. That Delete All button is just in a more natural place than the Delete button. Sorry about that.

I have all the patience in the world. On occasion, though, I would like a little feedback so that I can tell if you are being benefitted. You don't really offer any feedback, willingly, so an occasional challenge to drag it out of you may seem approriate to me. Even a frequent "Got it" or "I follow, now" really doesn't expose progress or comprehension.

I think we can get along.

So, does this mean you won't be answering my questions?
 
ok

From now on, I will show my work and allow all tutors to show me where the error was made. I should atleast show my work and not expect others to do it for me.
 
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