28.12: Questions
- Page ID
- 32829
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You should be able to answer these questions without too much difficulty after studying this TLP. If not, then you should go through it again!
What symmetry element must be absent for a material to be ferroelectric?
- Answer
-
C
Which of these is not a correct definition of polarisation?
- Answer
-
D
Why are domains in crystals found in a manner such that their polarisation is coupled?
- Answer
-
A
What is needed to make ferroelectric domains useful as a binary memory store?
- Answer
-
B
If a ferroelectric, 50mm by 10 mm, has a measured surface charge of 2.5 x 10-4 Coulombs, and a lattice parameter of 5 x 10-10, what is the dipole moment in a single cubic unit cell?
- Answer
-
A
What field has to be applied to give a ferroelectric, with a square hysteresis loop, zero net polarisation?
- Answer
-
C