Solving Resistivity Equations: Step-by-Step Guide

  • Thread starter Thread starter JoneS
  • Start date Start date
  • Tags Tags
    Resistivity
AI Thread Summary
The discussion focuses on the challenges faced in solving resistivity equations, specifically regarding the calculation of resistance and resistivity using voltage and current data. The user has graphed their results and applied the relevant formulas but is obtaining incorrect outcomes. Key formulas mentioned include m=volt/amp for resistance and resistivity equations involving area and length. There is confusion among participants about the specifics of the results being sought and the clarity of the initial question. The conversation highlights the need for clearer communication and understanding of the problem at hand.
JoneS
Messages
3
Reaction score
0
it all seemed pretty easy to start off with I've got all my results.
Voltage against current with a variable thing. but i can't do the equation, i have drawen up the graphs and followed the formulas but the results all come out wrong.

formulas: m=y/x m=volt/amp r=1/m which is the resistance
resistivity= r=p*a/l p=r*l/a

After competing these formulas the result comes out wrong HELP:frown:
 
Physics news on Phys.org
Originally posted by JoneS
... with a variable thing.
Huh?




Originally posted by JoneS
... i can't do the equation, ...
What do you mean by this?




Originally posted by JoneS
After competing these formulas the result comes out wrong ...
What result? What are you trying to find?
 
i know... wut the hell? did u read the question after tuyping it?
 
I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
Thread 'A cylinder connected to a hanging mass'
Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
Back
Top