DoITPoMS

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!

1. When the temperature of a pyroelectric is changed, where does the resultant charge imbalance arise?

   	a	On the surface with one end positive and one end negative.
   	b	In the centre, at a point of mismatched domains.
   	c	On the surface with both ends positive.
   	d	On the surface with both ends negative.

2. Which of these is not a basic requirement for a pyroelectric?

   	a	A temperature dependent polarisation.
   	b	A spontaneous polarisation.
   	c	A polar structure.
   	d	A simple cubic structure.

3. What type of variable is polarisation?

   	a	Scalar.
   	b	Vector.
   	c	Constant.
   	d	Symmetric.

4. Direct electrical measurement can necessarily identify what?

   	a	True pyroelectric coefficient.
   	b	Dipole moment.
   	c	Generalised pyroelectric coefficient.
   	d	Domain structure.