M&I 51-100

PTC stands for

• post temperature component
• positive temperature coefficient
• positive transistor conductor
• post transistor coefficient

Thermocouple converts temparature into

• volatage
• resistence
• current
• temprature

Working principle of a thermocouple depends on the

• Mechanical displacement
• Electric effect
• Thermal effect
• thermo-electric effect

The amount of the current produced depends on the difference in temperature between the two junctions

• Static electric effect
• see beck effect
• petlier effect
• Pizo electric effect

Thermocouple has

• 2 junctions
• 3 junctions
• 4 junctions
• no junction

J type thermocouple is combination of

• Copper Constantan
• Iron Constantan
• Chromel Alumel
• Cobalt

K type thermocouple is combination of

• Copper Constantan
• Iron Constantan
• Chromel Alumel
• Cobalt

T type thermocouple is combination of

• Copper Constantan
• Iron Constantan
• Chromel Alumel
• Cobalt

J type thermocouple+ve terminal

• Iron
• Constantan
• chromel
• Alumel

J type thermocouple -ve terminal

• Iron
• Constantan
• chromel
• Alumel