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2
questions
2
votes
2
answers
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$i = \frac{dq}{dt}$ implies $\Delta q = i \Delta t$? Incorrect mathematics used as some kind of hand-wavy justification for an engineering equation?
I am reading an electrical engineering textbook that states that the relationship between current $i$, charge $q$, and time $t$ is
$$i = \dfrac{dq}{dt} \tag{1}$$
Based on this, the authors then state ...
- 4,322
0
votes
1
answer
323
views
end-to-end resistance of a truncated cone
Basically the question is the resistance of the whole truncated cone which has top and bottom coal-flaps with radius $r_1$ and $r_2$. I have the $r(x)$ given by a function. I know that I have to ...
- 103