What force is generated when two wires of different material are joined together at either end, forming two junctions which are maintained at a different temperature?(a) chemical reactive(b) electro-motive(c) thermo-motive(d) mechanicalI had been asked this question in final exam.My query is from Essential Parameters for Telemedicine in division Telemedicine Technology of Biomedical Instrumentation

What force is generated when two wires of different material are joine

1.	What force is generated when two wires of different material are joined together at either end, forming two junctions which are maintained at a different temperature?(a) chemical reactive(b) electro-motive(c) thermo-motive(d) mechanicalI had been asked this question in final exam.My query is from Essential Parameters for Telemedicine in division Telemedicine Technology of Biomedical Instrumentation
Answer» Right option is (c) thermo-motive Easy explanation: When two wires of different material are joined TOGETHER at either ends, forming two JUNCTIONS which are maintained at a different temperature, a thermo-motive force is generated causing a current to FLOW around the circuit. This arrangement is CALLED a thermocouple. The junction at a LOWER temperature in the thermocouple is called the reference temperature. The junction at a higher temperature in thermocouple is termed as measuring junction.

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