Which is true about Rochelle's salt and lead zirconate? (A) Rochelle's salt is ferroelectric while lead zirconate is anti-ferroelectric (B) Rochelle's salt is anti-ferroelectric and lead zirconate is ferroelectric (C) Both are ferroelectric (D) Both are anti- ferroelectric
Which is true about Rochelle's salt and lead zirconate? (A) Rochelle's salt is ferroelectric while lead zirconate is anti-ferroelectric (B) Rochelle's salt is anti-ferroelectric and lead zirconate is ferroelectric (C) Both are ferroelectric (D) Both are anti- ferroelectric
Answer
Answer: A Rochelle saltis a potassium-sodium tartratetetrahydrate (KNaC4H4O. 4H2O) and belongs to the family of uniaxialferroelectrics.
Lead zirconate(PbZrO3) is anantiferroelectricmaterial melting at about 12507deg;C and having the Curie temperature of 230C.1
The wave function (in SI units) for an electromagnetic wave is given as \(\psi (x,t)={ 10 }^{ 3 }\sin p{ \left( 3\times { 10 }^{ 6 }x-9\times { 10 }^{ 14 }t \right) } \).The speed of the wave is:
Pragya Raptor code around a circular path of radius 4 cm and cut off the length required to the end. Then she wrapped it around a square box of side 4 cm did she have any code left?
Wood of Gymnosperms is composed of (A) Only tracheids in the xylem (B) Only vessels and xylem parenchyma (C) Only fibres and xylem parenchyma (D) Only fibres and vessels