Questions
Quick questions
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!
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What symmetry element must be absent for a material to be ferroelectric?
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Which of these is not a correct definition of polarisation?
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Why are domains in crystals found in a manner such that their polarisation is coupled?
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What is needed to make ferroelectric domains useful as a binary memory store?
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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 m, what is the dipole moment in a single cubic unit cell?
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What field has to be applied to give a ferroelectric, with a square hysteresis loop, zero net polarisation?