QUESTION 1 What is the principal property of a piezoelectric crystal oa Changes

Question

QUESTION 1 What is the principal property of a piezoelectric crystal oa Changes shape with temperature o b. Changes voltage with temperature o c. Changes voltage when mechanical force is applied o d. QUESTION 2 Do thermistors or thermocouple have a linear response? o a Thermistors yes, thermocouple no b. Thermistors no, thermocouple no Thermistors no, thermocouple yes o d. QUESTION 3 What is the most common use of capacitive sensors? o a measure flow o b measure heat QUESTION 4 Thermistors and thermocouples measure the same measurand? True Faise QUESTION 5 of the followving is an inventor of the strain-gauge sensor? o a Thomas John Seebeck o b Pierre Courie oc Simmons

Explanation / Answer

1. When force is applied on a piezoelectric crystal electric charges are produced on its surface therefore C is the correct option.

2. In thermocouple as temperature increases the voltage increases nonlinearly whereas in thermistor as temperature increases voltage decreases exponentially thus both of them have non linear response. Therefore option B is correct.

3. Capacitive sensors are most commonly used to measure diaplacement.

4. Yes both the thermocouple and thermistor are temperature sensors and measure the temperature.

5. Strain gauge sensor was invented by Edward E. Simmons and Arthur C. Ruge therefore C is the correct option.

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