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  1. L

    What is ohms law (was Ic=C x dv/dt)

    I believe it was misstated. Should have read "... without being assaulted by stubborn curmudgeons."
  2. L

    What is ohms law (was Ic=C x dv/dt)

    So it becomes patently obvious that circuit analysts should model current flowing through a capacitor without being assaulted by curmudgeons claiming that Maxwell was wrong. Case closed.
  3. L

    What is ohms law (was Ic=C x dv/dt)

    You definitively state the obvious. Hmmmm. When anyone relies on the "Many Authorities Agree" defense, you know they have lost the argument because what that really means is, "While many authorities agree, most authorities do not subscribe to the crackpot proposition being purveyed."...
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    math problem, I lost my marbles it seems

    If it is difficult to remember the rules for algebraic manipulation & solution, one alternative is to use symbolic algebra software. There are many products available, some even free for use online, such as the example attached.
  5. L

    What is ohms law (was Ic=C x dv/dt)

    Correct. That is because displacement current is not conduction current. But what you aver is not the the whole picture. What you aver leads to a discontinuity in the current flow. What you aver is what Maxwell found necessary to correct. That is because the displacement current is a real...
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    What is ohms law (was Ic=C x dv/dt)

    You should refer to these class notes for a course in Applied Electromagnetics. http://whites.sdsmt.edu/classes/ee382/notes/382Lecture5.pdf Then you may be able to understand the following diagram showing displacement current flowing through the dielectric of a capacitor.
  7. L

    What is ohms law (was Ic=C x dv/dt)

    Note that the original posting that started this discussion (and which seems to have been lost from this thread) described a problem that was in the sinusoidal steady state, and therefore required only the use of reactance and Ohm's Law (because reactance is measured in ohms) for solution. Only...
  8. L

    What is ohms law (was Ic=C x dv/dt)

    For a non-linear V-I characteristic we can find the corresponding dynamic resistance, and the dynamic resistance does obey Ohm's Law - over a small segment.
  9. L

    What is ohms law (was Ic=C x dv/dt)

    What would be the purpose of discussing non-ohmic materials in a discussion of Ohm's Law?
  10. L

    What is ohms law (was Ic=C x dv/dt)

    Instead of consulting physics textbooks to understand Ohm's law, it may be more fruitful referring to Ohm's original treatise from 1827 on the Galvanic Circuit, specifically its 1891 English translation. Attached is a partial extract of said document, specifically the last few pages reviewing...
  11. L

    What is ohms law (was Ic=C x dv/dt)

    The reason we get involved with reactance is to avoid dealing with differential equations. Reactance is easy, differential calculus is hard. I'll go with what most folks believe, because we can honor Georg Simon Ohm for his contribution by naming anything we want as Ohm's Law; not necessarily...
  12. L

    Ic=C x dv/dt

    The differential equation in the title of this thread is the usual starting point for the transformation of networks to the steady-state frequency domain. But if you had read further in the book it would have undoubtedly explained how to calculate the value of capacitive reactance, and how to...
  13. L

    i need help with my instrumentation assignment. It's about fontana bridge circuit :)

    You could download the original paper by Giorgio Fontana from Cornell University -- https://arxiv.org/abs/physics/0209038
  14. L

    Schmitt Trigger Help

    The Motorola datasheet provides several relevant examples.......
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    AC circuit voltage can be described using a sine wave with the equation??

    The quantity in the parentheses is given in radians. There are 2π radians in 360°. So are you expected to give the frequency in radian measure or in Hz? Phase shift in radians or degrees?
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    Hacking Nodal and Loop Analysis

    As someone who uses only nodal analysis for all problems, I may not be a good source of unbiased advice. However, back when I was a first-year student it was difficult to grok nodal analysis, so all problems were solved with mesh currents. But now I can just look at a circuit and write the node...
  17. L

    help with homework

    If you color-coded the wires, you would not need to work so hard.
  18. L

    help with homework

    Again, if you color-code the wires then it will be easy to see which resistors are shorted out.
  19. L

    help with homework

    If you color-code the wires it should be easy to see that R1,R2,R3 are in parallel; R6,R7,R8 are in parallel; R4,R5 are in parallel.
  20. L

    Understanding Positive and Negative charges

    In my opinion, the concept of positive & negative charge is more useful in chemistry or physics than in electronics. It is also somewhat unfortunate that physical current flow is the movement of negative charge electrons because the standard convention for circuit analysis is to assume positive...
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