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$H00t!N& $t@r:
Can sm1 explain what a thermocouple is and its function? and how much about it do we have to know for the igs
 
Thanks

Saladin:
This is a temperature measuring device.  It consists of two wires of different metals, such as copper and iron, joined together.  If there is a temperature difference between the two junctions, a current flows.  The current causes a deflection on a galvanometer.  So, for example, if the temperature of one junction is at 0OC and the other used to measure the temperature of an object then, depending on the current that flows, it is possible to work out the temperature of the object.
The thermocouple is very sensitive and can measure temperatures from –250OC to 1500OC.  It is especially useful for measuring the temperature of very small objects and rapidly changing temperatures.

$H00t!N& $t@r:

--- Quote from: The Mysterious Dude on May 05, 2010, 04:55:04 pm ---This is a temperature measuring device.  It consists of two wires of different metals, such as copper and iron, joined together.  If there is a temperature difference between the two junctions, a current flows.  The current causes a deflection on a galvanometer.  So, for example, if the temperature of one junction is at 0OC and the other used to measure the temperature of an object then, depending on the current that flows, it is possible to work out the temperature of the object.
The thermocouple is very sensitive and can measure temperatures from –250OC to 1500OC.  It is especially useful for measuring the temperature of very small objects and rapidly changing temperatures.



--- End quote ---


Thanks alot! you've been really helpful. I've been trying to figure out how to add rep. cz u really deserve it. Cud u tell me hw to do it.  ;D Thanks again!  May you have a successful future. Ameen

Saladin:

--- Quote from: Shooting Star on May 05, 2010, 05:57:33 pm ---
Thanks alot! you've been really helpful. I've been trying to figure out how to add rep. cz u really deserve it. Cud u tell me hw to do it.  ;D Thanks again!  May you have a successful future. Ameen

--- End quote ---

Press the heart button in my post.

Vin:


hey in the ms they say  refractive index (n) =  sin i / sin r ...  OR  sin r / sin r

so aren't they two different things??

n can some1 explain me the question too..its june 09 paper 3

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