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Module 5: Microfluidic Actuation Systems: Micropumps and Valves

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Which of the following is an example of an Active Microvalve?

(i) Check Valve
(ii) Piezoelectric Valve
(iii) Flap Valve
(iv) Ball Valve

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Answer: (ii) Piezoelectric Valve

A piezoelectric valve is an active microvalve because an external electrical signal produces mechanical deformation of the piezoelectric actuator, which opens or closes the fluid path.

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