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16. Value of dielectric constant for a material __________.
(A).Equal to 1
(B).Greater than 1
(C).Less than 1

17. High dielectric constant material is must for __________.
(A).Insulation of wires
(C).Switch bases

18. Dielectric constant for most polymers lies in the range of _______.

19. Example for piezo-electric material
(A).Rochelle salt
(B).Lead zirconate
(C).Potassium niobate
(D).Barium Titanium oxide

20. Example for ferro-electric material
(A).Potassium niobate
(B).Lead titanate
(C).Lead zirconate