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  1. R

    Curious inductor question

    No, inductors present a higher reactance to higher frequencies. Reactance and resistance are two different phenomena. Ratch
  2. R

    Watts, Amps, and Volts Explained

    It is basically wrong and confusing. For instance, voltage (joules/coulomb) is not equivalent to pressure (newtons/meter^2). What is there about electrical units that you do not understand? Ratch
  3. R

    Watts, Amps, and Volts Explained

    Do hydraulic engineers study electrical circuits to understand hydraulics? If not, they why are you studying hydraulics to understand electrical circuits? Why confuse things with a mind melt of the two subjects. Each field of study is its own thing. What concept about circuits is it that you...
  4. R

    Watts, Amps, and Volts Explained

    Electricity and water don't mix too well.
  5. R

    Watts, Amps, and Volts Explained

    Nice concise definitions. I would add that the circuit did not leak, and you did not get wet from the hydro-analogies. I would further add that current is charge flow, and current does not flow. Current exists or is present, but it does not flow. Also, Ohm's law pertains to the resistive...
  6. R

    Need help on DC Biasing

    What are you going to bias, the transistor?. The op-amp is taking care of the base, and the emitter is 0.7 V less than the base. What more is there to do? The collector current will vary depending on what resistance you connect to Vo. And who cares, as long as the BJT can handle the current...
  7. R

    Help with functions for my circuit

    Now, do it by node analysis. Ratch
  8. R

    Help with functions for my circuit

    How on Earth are you getting a quadradic trinomial in the denominator of your solution for i2 ? Perhaps more practice in solving for two unknowns with two equations is in order. Ratch
  9. R

    Help with functions for my circuit

    I get the feeling that you don't understand the big picture. Find the i2 loop current first. That is going to take two equations and two unknows (i1 and i2). Then multiply i2 by Zload to get the output voltage. Finally, divide the output voltage by Vsource to get the transfer function. Ratch
  10. R

    power supply

    I know this post is getting old, but the link below seems to answer the question...
  11. R

    Help with functions for my circuit

    You are going about solving the problem all wrong. You are trying to solve for the loop currents when you want to find the voltage transfer (TF) function, right? Your method will work, but it is a lot simpler to use node equations instead. You can solve for Vout directly, and find the TF by...
  12. R

    LTSpice phase angle of RC circuit, why is phase angle increasing with frequency?

    Because voltage has magnitude but no direction, it should not be called a "voltage vector". Voltage has a phase difference with current, so it should be called a voltage phasor. Ratch
  13. R

    LTSpice phase angle of RC circuit, why is phase angle increasing with frequency?

    Sometimes, you got to look at the algebra of a circuit instead of a simulator to see what is going on. As you can see, the imaginary (orthogonal) part of the voltage completely dominates the term when omega becomes large. Even if the magnitude of the voltage becomes smaller. Ratch
  14. R

    Does electron die?

    What value? A capacitor is usually defined as being fully energized or de-energized after 5 time- constants. Ratch
  15. R

    Plotting curves into Diagram

    Ratch
  16. R

    Does electron die?

    Because I set up a loop equation using voltage. You must integrate the current that is energizing the capacitor in order to get voltage. A little googling on the internet can provide a lot of knowledge. http://www.dummies.com/how-to/content/relate-the-current-and-voltage-of-a-capacitor.html...
  17. R

    Does electron die?

    Did you not ask for an example in post #61? If you are going to use differentials to specify currents and voltages in a circuit, then you have to solve those differential equations. Ratch
  18. R

    Does electron die?

    Fine, set up a differential equation and solve it. What are you talking about? Your schematic shows a DC source being applied to a resistor and capacitor in series. Why is frequency involved? Ratch
  19. R

    Does electron die?

    OK, first things first. The reason I did not participate in that "discussion" was because I did join this forum until 6 months later. You are correct in your assertion about Ohm's law, but you did not articulate the fact that E=IR is the definition of resistance. Furthermore, you should had...
  20. R

    Does electron die?

    Materials and components whose E/I remains constant over a wide range of current is called "ohmic", and are said to obey Ohm's law. Components like a junction diode whose E/I changes depending on the current is called "non-ohmic", and do not obey Ohm's law...
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