Dissemination of IT for the Promotion of Materials Science (DoITPoMS)

DoITPoMS Teaching & Learning Packages Pyroelectric Materials Questions
Pyroelectric Materials AimsBefore you startIntroductionPolarisationVariation of Polarisation with TemperatureBehaviour around the Curie pointThe Direct and Indirect EffectExample Pyroelectric MaterialsTriglycine sulphatePolyvinylidene fluorideApplication of a Pyroelectric-Infrared detectionPollutant ControlSummaryQuestionsGoing further
TLP creditsTLP contentsShow all content
Viewing and downloading resourcesAbout the TLPsTerms of useFeedbackCredits Print this page
PreviousNext

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.

PreviousNext