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  1. R

    Resistive voltage dividers and flowing currents.

    First of all, you are using technical slang when you say or write "current flow". Even when everyone knows what you mean, that is not the correct description of what is happening. Current is charge flow, so current flow means "charge flow flow". Although just about everyone uses that term...
  2. R

    Same Polarity Charges Accumulating on Both sides of a Capacitor Simultaneously??

    I just love to talk about capacitors. But, let's get a few facts straight first. We have to be precise about this. What do you mean when you say you are "charging" a capacitor? What are you charging it with? Ratch
  3. R

    Passive sign convention

    Battery or whatever else, the 40 volt source is absorbing energy.
  4. R

    Passive sign convention

    I would think it would be 10 watts supplying, 50 watts supplying, 40 watts absorbing, 20 watts absorbing. Power generated is 60 watts, Power absorbed is 60 watts, Ratch
  5. R

    How to find out current in circuit?

    Yes, that is correct. The independent current source is going to output 4 amps regardless of what the value of R is. Likewise, the independent voltage source is going to output 50 volts regardless of what R is. All the other resistors are fixed in value. The only way you can change the...
  6. R

    How to find out current in circuit?

    You already did. 4=V/R+(V-50)/2=====> V=58 R/(2+R). Pick any R and the voltage can be calculated. Do you have a sense of what is going on? Ratch
  7. R

    How to find out current in circuit?

    You are getting careless in your proofreading. The I3 current present is 50 amps. After all, it has 50 volts across 1 ohm, doesn't it. You show 2 equations and 3 unknowns. Try to solve for only the voltage V across R, then you can easily find the currents elsewhere in term of R. Hint: Use...
  8. R

    How to find out current in circuit?

    You are completely lost. You have an independent voltage source and an independent current source. The R resistor can be any physical value you can name. Unless you specify what the current or voltage is present across or through the resistor, no specific value for R can be calculated. Ratch
  9. R

    Superposition on circuits with impedance elements

    That question is unnecessary to the problem solution. You have the link which shows the correct way to apply the current division method. You should question the person who gave you the wrong information. Ratch In a parallel circuit, the total resistance is less that the resistance of any...
  10. R

    Superposition on circuits with impedance elements

    https://www.google.com/search?q=current+divider+formula&rlz=1C1GIWA_enUS690US690&oq=current+div&aqs=chrome.3.69i57j0l5.5108j0j8&sourceid=chrome&ie=UTF-8 Ratch
  11. R

    Superposition on circuits with impedance elements

    I see I1a being multiplied by a ratio according to the Current Division Law. It calculates the current present in the rightmost branch. Why do you show the red current arrow direction in the rightmost branch opposing the direction of the current exiting 10 volt source? Ratch
  12. R

    Active and resistive load current

    Yes, that is the topological circuit difference, but the OP asked what is the difference in current. Can an ammeter tell the difference? Inquiring minds would like to know. Ratch
  13. R

    Active and resistive load current

    The OP asked what is the difference between active load current and static resistive load current. Before that can be answered, those terms have to be defined. To just say that those "adjectives" are not the same is a distinction without a difference. So, it is not "silly" to wonder what the...
  14. R

    Active and resistive load current

    So, how are their currents different? Ratch
  15. R

    Active and resistive load current

    Current in a circuit measures the same no matter what causes it. I have never heard of those two terms you are asking about. Can you provide a link to some easy to access document where those terms are mentioned? Ratach
  16. R

    Creating a variable wien bridge oscillator

    Look at post #29 of the link below. It shows how to adjust the frequency with only one pot. Also, look at post #11, and follow the advice of Jeri, who doesn't tolerate those folks with lame parts...
  17. R

    I need some fresh eyes

    Did you say fresh eyes, or refreshing eyes? Here is a refreshing pair of eyes. And here is another one. Ratch
  18. R

    Constant current (or voltage) source WITHOUT semiconductors?

    Sure, it is easy to do. Suppose you want to build a 10 ma constant current DC current source. Find a 100 volt DC supply. Then insert a 10k resistor in series with the voltage.source. Now you have a 10 ma current source that will use 100 volts to assure that 10 ma exists. If that is not...
  19. R

    A device to defeat robocalls

    If your carrier supports this service, then this https://www.nomorobo.com/ service will pretty much solve your problem. I use it and it works great. It's also free. Ratch
  20. R

    Why DC motor draws more current with friction?

    A heavier load on the motor causes it to demand more current. More current causes the battery to lower its output voltage. This is because increased current across the internal battery resistance causes a larger internal voltage drop, which takes more voltage away from the battery output...
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