Answer / gopikrishna

WHEN DISIMILAR METALS OF DIFFERENT TEMPERATURES ARE JOINED
AN EMF IS INDUCED AT THE JUNCTION THIS IS SEEBACK EFFECT

Answer / renjith

When the junction of dissimilar metals are kept at different
temperatures,then an emf is introduced b/w both the junction.

Answer / bharathi

Two dissimilar material jointed together it is called hot
junction and kept free other end it is called cold junction.
An emf induced at cold junction it directly proportional to
temperature difference between two junctions. For example
the hot surface is in 300 deg c (hot junction) and room temp
is 30 deg c (cold junction) you will get mv which is equal
to 270 deg c.

Answer / hgh

Two dissimilar material jointed together it is called hot
junction and kept free other end it is called cold junction.
An emf induced at cold junction it directly proportional to
temperature difference between two junctions. For example
the hot surface is in 300 deg c (hot junction) and room temp
is 30 deg c (cold junction) you will get mv which is equal
to 270 deg c.
When the junction of dissimilar metals are kept at different
temperatures,then an emf is introduced b/w both the junction

Answer / rajesh

when any two dissimilar metals joined at each end ,one
junction at higher temp another at low temp ,then there
induced an emf ,thats depend on differrence between two
junction temperature

Answer / bilawal

when any two metals of different nature joind from both the
ends and then heated from on end the current is being
prodused due to the different value of electron in outer
most shell of the metals.

Answer / prasath

THE TEMPERATURE DIFFERENCE BETWEEN TWO DISSIMILAR METALS ARE JOINED AN EMF IN INDUCED AT THE JUNCTION THIS IS SEEBACK EFFECT.

Answer / manish kumar tiwari

WHEN TWO DISSIMILAR METALS ARE AT DIFFRENT TEMPRETURE ONE OF
THEM IS HOT AND ANODER COLD COMPARING TO IT AND WHEN THE
TEMPRETURE WILL INCRISE IN HOT END THEN AN E.M.F. WILL
INDUSED IN JUNCTIONOF BOTH METALS AND IT IT WILL BE IN "mv"

Answer / samira patel (itps)

IF TWO DISSIMILAR METALS ARE JOINED TOGETHER SO AS TO FORM A
CLOSED CIRCUIT ,THERE WILL BE TWO JUNCTION FORMED WHERE THEY
MEET EACH OTHER.ONE OF THE JUNCTION IS CALLED HOT JUNCTION
OR REFERENCE JUNCTION AND ANOTHER JUNCTION IS CALLED COLD
JUNCTION OR MEASURING JUNCTION.IF HOT JUNCTION IS HEATED AN
EMF IS INDUCED AND FLOWS THROUGH THE WIRE ,THAT IS MEASURED
BY A GALVANOMETER OR MULTIMETER.THIS EFFECT IS CALLED
THERMOELECTRIC EFFECT AND THIS IS FIRST OBSERVED IN 1821 BY
SEEBACK SO IT IS ALSO CALLED AS SEEBACK EFFECT.

whyvibration probe (bently nevada ) is set -10 volt for zero reference?

2 Answers  

For an Instrumentation Engineer, is there any effect on Instruments of safety zones like zone0, zone1, zone2. As an instrumentation Engineer, what we have to consider or remember while working in these areas.( zones 0,1,2).

1 Answers  

I have one problem for masoneilan displacer type LT.I give some imformation in data shéet given for liquid level range 0 to 600 mm and sg .955 problem is 0% is ok 25%(23%) or 50%(48%)and 75%(73%) and 100% is ok this is up value and down value all ok so please halpe me

2 Answers   Hyundai, TATA,

I m appointed as an automation trainee engineer in small firm in that I am only the one , my company give me a project on s7-200 as i m beginner I don't know how to program so please send me the helpful site so that I complete my project before deadline....please help me out in this critical situation.

0 Answers  

My rtd working well at the same time r/i converter is not working properly.when power is given to rtd..it is giving 30mA and getting 2.4 mA if i remove the compensate leads No matter how many ohms.why it is happening like so?what is the solution?rtd range-0-200deg c& 4-20 mA o/p.please give me solutiin anyone......

1 Answers  

We have ZR22G-100-S-A-E-T-T--E-A/CV/F1 Model Zirconia Oxygen analyser which is Yokogawa make. I kept the analyser in Flue gas path at Air pre heater area. My plant is 7.5MW Biomass power plant. For a particular fuel, Coconut Husk which contains Sodium and Potassium chlorides iam not getting proper reading, Analyser output always Zero. I calibrated the analyser and it is OK. For Other fuels like Wood chips, Cholam waste, DOB, Groundnutshells, Ply wood waste and all iam getting actual percentage of Oxygen. What is the main reason behind this draw back?

2 Answers  

How addressable fire systems work? Pl. send details with architect.(Loop), also send details regarding Gas system. Pl. help me.Thanks

0 Answers   Siemens,

what is the diffirence between Earth and Neutral

4 Answers  

can you suggest good traning institute in instrumentation ? (in automation, or designing)

5 Answers  

Why we are using temperature and pressure as a reference when measuring flow of steam?

4 Answers   Shell,

How do you measure g's?

5 Answers   Aramco, GNFC, HPCL, Polmon, Thermax,

How to Calibrate the magnetic flow meter on site ?

1 Answers   MRL,