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10. Describe the working principle of thermocouple sensors (K-type). (less than 100 words) 11. Describe the...

10. Describe the working principle of thermocouple sensors (K-type). (less than 100 words)

11. Describe the working principle of optical mouse. (less than 100 words)\

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10) Therocouple is a device used extensively for measuring temperature . Thermocouple consists of two metals joined end to end to form two junctions . One is connected to the hot junction and the other one to the cold junction .The thermocouple measures the unknown temperature of the body with reference to the known temperature of the other body

11) It is a device that is used to measure the motion and acceleration of pointer. It uses light source instead of balls to judge the motion of the pointer.light is focussed on the lens. It diverges and comes to the surface deflection from two plates . Photo detector picks up the change in intensity of light at different position . Signal is processed and transferred to the computer .

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