What is the voltage across a resistor in an electrical circuit?

  • Thread starter Thread starter FlexedCookie
  • Start date Start date
  • Tags Tags
    Resistor Voltage
AI Thread Summary
The voltage across a resistor in an electrical circuit can be expressed using Ohm's Law, which states that voltage V(t) equals the product of resistance R and current i(t). The discussion highlights confusion regarding a formula involving a square root and pi, with participants noting that it does not align with standard equations. The relationship between power, voltage, and current is also mentioned, specifically p(t) = v(t) · i(t) and its rearrangement. Participants suggest seeking clarification from the teacher due to the confusion surrounding the formula. Overall, the conversation emphasizes the need for a clearer understanding of voltage calculations in electrical circuits.
FlexedCookie
Messages
3
Reaction score
0

Homework Statement


The voltage V(t) [in volts] across a resistor in an electrical circuit at a given time t [in seconds] is given by:

sqrt of something to the power of pi

^ that's the example i got in my book. Its just got the square root symbol, a space, and then a pi in an exponential position.


Homework Equations





The Attempt at a Solution

 
Physics news on Phys.org
power as a function of time: p(t)=v(t) · i(t)

Ohm's Law: v(t)=R · i(t)

The nearest matching your case that I can see is p(t) = (v(t))2 /R
when rearranged to v(t) = ...

No power of Pi. :rolleyes:
 
Im very confused too. I thought i must have been missing something. Ill bring it up with the teacher.

Thanks mate
 
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...
Back
Top