Simple Electrical Trick Question Maybe?

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Discussion Overview

The discussion revolves around a homework problem involving electrical concepts, specifically the evaluation of charge, current, power, and energy over time. Participants are exploring the relationships between these quantities and the necessary parameters to compute them, particularly focusing on the role of voltage.

Discussion Character

  • Homework-related, Technical explanation

Main Points Raised

  • One participant describes their attempt to find power and energy from a given current function, noting a potential missing variable that complicates the calculations.
  • Another participant expresses frustration over the lack of clarity in the original post and suggests that the question needs to be more specific, particularly regarding the power being referenced and the voltage required for calculations.
  • There is a suggestion that voltage is an unknown necessary to compute power in watts, but this remains unconfirmed by others.

Areas of Agreement / Disagreement

Participants do not appear to reach a consensus, as there are differing views on the clarity of the original question and the necessity of additional information (like voltage) to solve the problem.

Contextual Notes

The discussion highlights the dependence on specific definitions and parameters, such as voltage and resistance, which are not provided in the original problem statement. This creates ambiguity in the calculations being attempted.

IronBrain
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Homework Statement



I had posted another thread a week ago where I was given a function q(t) that t was defined in millisecond, and I had to evaluate q(t) at 0 and infinity then I had to do the same thing when I found the current I(t) in Coulombs/ms, Now i have do the same further more by finding P(t)..power...and W(t) watt-second/energy used, I believe

The Attempt at a Solution



By simply converting my equation I(t) to seconds I was able to find the amount of amperes a second, however, to find power there seems to be a missing "X" factor when will help me find the Power, I would need to know at least voltage or watts to figure either one out, Seems I have one unknown here voltage which I don't know where to derive from with just Amperes, not given any electrical resistance because this function is not modelling or was given said diagram
 
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Jesus christ, BUMP
 
I do believe there is a missing unknown, that is needed to solve for power in terms of watts? Can anyone confirm this?
 
The thread has had a lot of views. The reason no one has answered is because it it really hard to know what you are talking about just from this post.

I looked at the thread you referred back to (note: *I* had to search for it)...

https://www.physicsforums.com/showthread.php?t=370136

...and basically you're going to have to be a lot clearer about what question you are asking here. What power are you referring to? If you want to compute the power delivered by a source that is driving this current I(t), you need to know the voltage of that source as a function of time.
 

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