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Engineering LibreTexts

12.6: Problems

  • Page ID
    19018
  • 12.1. Match each device, or device component, with the material or materials it is often made from.

    Device or device component Material
    1. Photovoltaic device A. Lead zirconium titanate
    2. Piezoelectric device B. Bismuth telluride
    3. Battery anode C. Cadmium telluride
    4. Thermoelectric device D. Mica, Quartz
    5. Dielectric between capacitor plates E. Zinc, Lithium

    12.2. For each device or device component listed in the problem above, indicate whether it is typically made from a conductor, dielectric, or semiconductor.

    12.3. For each of the devices below, list a material that the device is commonly made from.

    • Photovoltaic Device
    • Hall Effect Device
    • Piezoelectric Device
    • Capacitor

    12.4. Appendix B lists multiple units along with whether or not they are SI base units. The joule, volt, and pascal are all SI derived units. Express each of these units in terms of SI base units.

    12.5. Match the effect with the definition.

    1. When an optical field is applied to a dielectric material, a material polarization develops in the material. A. Hall effect
    2. When an optical field is applied to a semiconductor junction, a voltage develops across the junction. B. Electro-optic effect
    3. When a current passes through a uniform material which has a temperature gradient, heating or cooling will occur C. Photovoltaic effect
    4. When a mechanical stress is applied to a dielectric material, a material polarization develops in the material. D. Seebeck effect
    5. When the different sides of a junction are held at different temperatures, a voltage develops across the junction. E. Piezoelectric effect
    6. When an external magnetic field is applied across a conductor or semiconductor with current flowing through it, a charge builds up perpendicular to the current and external magnetic field. F. Thomson effect

    12.6. Match the device with its definition.

    1. A device which converts electromagnetic (often optical) energy directly to electricity A. Fuel Cell
    2. A device made from diodes of two dissimilar materials which converts a temperature differential to electricity B. Photovoltaic Device
    3. A device which converts chemical energy to electrical energy through the oxidation of a fuel C. Piezoelectric Device
    4. A device which converts mechanical stress directly to electricity D. Pyroelectric Device
    5. A device made from a crystal without a center of symmetry which converts a temperature differential to electricity E. Thermoelectric Device