13. Piezoelectric materials are ----- a) Metals b) polymers c) ceramics d) Compo

Question

13. Piezoelectric materials are -----

a) Metals

b) polymers

c) ceramics

d) Composites

14. The vibration frequency of quartz

a) 1kHz

b) 10 kHz

c) 20 KHz

d) 30 KHz

15.The purpose of diaphragm of piezoelectric pressure sensors is --------------

a) To convert pressure to electricity

b) To protect the crystal

c) To protect vacuum space

d) To protect piezoelectric layers

16. An applied voltage will cause a piezoelectric crystals to .......

a) Change direction

b) Change chemical structure

c) Change shape

d) Change color

17. Which type of accelerometer is most widely used for measuring vibration and shock?

a) Capacitive

b) MEMS

c) Piezoelectric

d) Piezoresistive

18. MEMS-based accelerometers are typically:

a) Capacitive

b) Inductive

c) Microphone

d) Piezoelectric

e) Piezoresistive

f) Piezoinductive

Explanation / Answer

13.) Ceramics

14.) 30 kHz

15.) To convert pressure to electricity

16.) Change shape

17.) Piezoelectric

18.) Piezoresistive and Variable capacitive

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