Coursework Help: Electrical Resistance of Brick Changes with Temperature

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Discussion Overview

The discussion revolves around the electrical resistance of a house brick and how it varies with temperature, specifically in the context of a coursework assignment. Participants seek assistance with resistivity values, methods for measuring resistance, and considerations for high-temperature applications.

Discussion Character

  • Homework-related
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant requests a value for the resistivity of brick, ideally with a source, and seeks a method for attaching wires to measure resistance at high temperatures.
  • Another participant suggests that resistivity may not be necessary, proposing instead to measure the potential difference and current to calculate resistance, while noting the potential resistance in the connecting wires due to heating.
  • A participant mentions the use of conductive paint as a method for connecting wires to the brick.
  • There is uncertainty about whether conductive paint can withstand temperatures of up to 800 degrees Celsius.
  • Several participants indicate they are working on similar coursework, expressing varying levels of confusion and seeking clarification.

Areas of Agreement / Disagreement

Participants express differing opinions on the necessity of knowing the resistivity of the brick, with some arguing it is not required while others have not taken a definitive stance. The discussion remains unresolved regarding the best method for wire attachment and the suitability of conductive paint at high temperatures.

Contextual Notes

Participants have not provided specific resistivity values or detailed methods for measuring resistance, and there are unresolved questions about the performance of materials at high temperatures.

gazchatterton2003
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I currently have to produce a piece of coursework on the electrical resistance of a house brick and how it changes with temperature i was wondering if anyone could help me with certain aspects of it

Does anyone know a value for the resistivity of a brick preferably with a quoted source. Also I am in need of a method of fixing to wires to a brick so i can measure the bricks resistance using an digital amp metre bearing in mind that in this method will have to with stand temperatures of up to 800 degrees c in a kiln

thanks in advance gaz :smile:
 
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gazchatterton2003 said:
I currently have to produce a piece of coursework on the electrical resistance of a house brick and how it changes with temperature i was wondering if anyone could help me with certain aspects of it

Does anyone know a value for the resistivity of a brick preferably with a quoted source. Also I am in need of a method of fixing to wires to a brick so i can measure the bricks resistance using an digital amp metre bearing in mind that in this method will have to with stand temperatures of up to 800 degrees c in a kiln

thanks in advance gaz :smile:

hey I am doing same planning exercise OCR right

i don't think you need the restivity of the brick, you just have to measure the p.d across the brick and the current at each different temp to find the resistance, hence you don't needs its restivity.

fixing wires to a brick I am still not sure,

plus you have got to take into account there's going to be resistance in the connecting wires that connect to the brick because i wod assume they will be heated as well within the temperature range
 
Stalybridge as in Manchester Stalybridge?
 
Yes

brewnog said:
Stalybridge as in Manchester Stalybridge?

yer i live in stalybridge
 
westerman16 said:
hey I am doing same planning exercise OCR right

i don't think you need the restivity of the brick, you just have to measure the p.d across the brick and the current at each different temp to find the resistance, hence you don't needs its restivity.

fixing wires to a brick I am still not sure,

plus you have got to take into account there's going to be resistance in the connecting wires that connect to the brick because i wod assume they will be heated as well within the temperature range

yup I am doing ocr planning exercise
 
im doing the the same plan and i know that you can connect wires to the brick with something called conductive paint
 
jkl34 said:
im doing the the same plan and i know that you can connect wires to the brick with something called conductive paint

is that going be withstand the temperature at 800 degrees?

:smile:
 
mmm...im doing the same exercise. VERY stumped
 

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