Which arrangement of voltmeter is better for measuring p.d. across a capacitor?

  • Thread starter Thread starter samuelwsc
  • Start date Start date
  • Tags Tags
    Voltmeter
AI Thread Summary
The discussion centers on two arrangements for measuring the potential difference (p.d.) across a capacitor using a voltmeter and ammeter. Arrangement 1 places the voltmeter in parallel with the capacitor, while Arrangement 2 positions it in series with the ammeter. If the ammeter has resistance, Arrangement 2 is favored for more accurate readings since it avoids measuring the p.d. across the ammeter. However, some experiments have successfully used Arrangement 1, suggesting it may have specific advantages in certain contexts. The debate highlights the importance of considering the ammeter's resistance when choosing the measurement setup.
samuelwsc
Messages
2
Reaction score
0
1.  ----┤├----(ammeter)-------
    |  cap                |
    |                  |
    └------(voltmeter)-----┘

     
2.  ----┤├----(ammeter)-------
    | cap     |
    |       |
    └ (voltmeter)┘

Two different arrangement of voltmeter are used to measure the p.d. across the cap. What are the pros & cons of using arrangement 1 ?
can anyone help me with this question? :smile:
 
Last edited:
Physics news on Phys.org
If the ampere meter is ideal (that is, it has no resistance), then there is no difference. So let's assume the ampere meter does have some resistance, which of the arrangements would give a more accurate reading for de potential difference over the capacitator?
 
i think arrangement 2 would give a more accurate reading as it doen't involve
the p.d. across the ammeter . But then what is the advantage of using 1 :confused: i saw some experiments using it...
 
Thread 'Struggling to make relation between elastic force and height'
Hello guys this is what I tried so far. I used the UTS to calculate the force it needs when the rope tears. My idea was to make a relationship/ function that would give me the force depending on height. Yeah i couldnt find a way to solve it. I also thought about how I could use hooks law (how it was given to me in my script) with the thought of instead of having two part of a rope id have one singular rope from the middle to the top where I could find the difference in height. But the...
Thread 'Voltmeter readings for this circuit with switches'
TL;DR Summary: I would like to know the voltmeter readings on the two resistors separately in the picture in the following cases , When one of the keys is closed When both of them are opened (Knowing that the battery has negligible internal resistance) My thoughts for the first case , one of them must be 12 volt while the other is 0 The second case we'll I think both voltmeter readings should be 12 volt since they are both parallel to the battery and they involve the key within what the...

Similar threads

Back
Top