Advanced Project - Wheatstone Bridge for TCR measurements

AI Thread Summary
The discussion centers on conducting an experiment to determine the temperature coefficient of resistance (TCR) for copper using a Wheatstone bridge. The participant expresses uncertainty about the practical setup and required apparatus for the experiment, particularly in proving the formula Rt = Ro (1 + alpha(t)). They mention difficulty accessing relevant resources, as their school's library lacks the necessary book. A suggestion is made to refer to the Wikipedia page on the Wheatstone Bridge, specifically the Carey Foster bridge for measuring small resistances. The participant plans to seek assistance from their teacher for further guidance.
Pleonut
Messages
2
Reaction score
0
Advanced Project -- Wheatstone Bridge for TCR measurements

Ok, so I have to do this experiment on my own as part of my coursework this year and I picked something called the temperature coefficient of resistance.

I think I basically have to determine the TCR or copper and I'm almost certain that I need to use a Wheatstone bridge. The theory behind the experiment makes sense to me I guess, but I'm not very good at the practical stuff and I'm not really sure what apparatus I need for it. I have to prove the formula:-Rt = Ro (1 + alpha(t) ) if that helps at all.

Unfortunately, the only book my school has with any information about my experiment isn't in the library at the moment and I'm really struggling to find a version online that uses a Wheatstone bridge.

If anyone has done this experiment before or has any ideas on how I might set it up, I could really use the help :/
 
Physics news on Phys.org
Pleonut said:
Ok, so I have to do this experiment on my own as part of my coursework this year and I picked something called the temperature coefficient of resistance.

I think I basically have to determine the TCR or copper and I'm almost certain that I need to use a Wheatstone bridge. The theory behind the experiment makes sense to me I guess, but I'm not very good at the practical stuff and I'm not really sure what apparatus I need for it. I have to prove the formula:-Rt = Ro (1 + alpha(t) ) if that helps at all.

Unfortunately, the only book my school has with any information about my experiment isn't in the library at the moment and I'm really struggling to find a version online that uses a Wheatstone bridge.

If anyone has done this experiment before or has any ideas on how I might set it up, I could really use the help :/

I googled Wheatstone Bridge for Resistance Measurements, which got me to the wikipedia page for Wheatstone Bridge.

On that page, the variation of the bridge best suited for measuring small resistances is the Carey Foster bridge:

http://en.wikipedia.org/wiki/Carey_Foster_bridge

That article should help you get going with your project. :smile:
 
Thanks, broski.

Although I decided to man up and just tell my teacher I was confused and he said he'd give me a hand tomorrow.

But cheers for the link (Even though it's that Wikipedia bollocks).
 
Last edited:

Thread 'Struggling to understand the concept of this question (ice cube in water optics question)'

TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
View full post »
Thread 'Variable mass system : water sprayed into a moving container'

Thread 'Variable mass system : water sprayed into a moving container'

Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...
View full post »

Similar threads

Measurement technology textbook problems
Replies
1
Views
598
Why Start a Wheatstone Bridge Experiment in the Middle for Greater Accuracy?
Replies
1
Views
3K
Find all resistor values in the Wheatstone bridge
Replies
3
Views
3K
Experiment using a Wheatstone Bridge
Replies
10
Views
4K
Instrumentation Amplifier for Wheatstone Bridge Output
Replies
27
Views
3K
Current through left bridge of a Wheatstone Bridge
Replies
2
Views
6K
How to ameliorate this Wheatstone bridge?
Replies
2
Views
2K
Why Does a Wheatstone Bridge Offer Higher Accuracy in Resistance Measurements?
Replies
1
Views
7K
Proof of Wheatstone bridge equation
Replies
7
Views
4K
How Is Current Calculated in a Wheatstone Bridge Setup?
Replies
25
Views
8K

Hot Threads

Recent Insights

Back
Top