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Materials and Components - Engineering

Q1:

Assertion (A): Ferroelectric materials have spontaneous polarization.Reason (R): Above curie temperature, ∈ = for ferro-electric materials.

A Both A and R are true and R is correct explanation of A

B Both A and R are true but R is not correct explanation of A

C A is true but R is false

D A is false but R is true

ANS:B - Both A and R are true but R is not correct explanation of A

Both A and R are correct. Spontaneous polarization vanishes above ferroelectric curie temperature.