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  2. Load cell - Wikipedia

    en.wikipedia.org/wiki/Load_cell

    Piezoelectric load cells work on the same principle of deformation as the strain gauge load cells, but a voltage output is generated by the basic piezoelectric material – proportional to the deformation of load cell. Useful for dynamic/frequent measurements of force.

  3. Theory of solar cells - Wikipedia

    en.wikipedia.org/wiki/Theory_of_solar_cells

    The theoretical studies are of practical use because they predict the fundamental limits of a solar cell, and give guidance on the phenomena that contribute to losses and solar cell efficiency. Band diagram of a solar cell, corresponding to very low current (horizontal Fermi level), very low voltage (metal valence bands at same height), and ...

  4. Solar cell - Wikipedia

    en.wikipedia.org/wiki/Solar_cell

    A solar cell, also known as a photovoltaic cell (PV cell), is an electronic device that converts the energy of light directly into electricity by means of the photovoltaic effect. [1] It is a type of photoelectric cell, a device whose electrical characteristics (such as current , voltage , or resistance ) vary when it is exposed to light.

  5. Electric battery - Wikipedia

    en.wikipedia.org/wiki/Electric_battery

    Wet cells were a precursor to dry cells and are commonly used as a learning tool for electrochemistry. They can be built with common laboratory supplies, such as beakers, for demonstrations of how electrochemical cells work. A particular type of wet cell known as a concentration cell is important in understanding corrosion.

  6. Alkaline battery - Wikipedia

    en.wikipedia.org/wiki/Alkaline_battery

    The voltage delivered to a load decreases as the current drawn increases and as the cell discharges. A cell is considered fully discharged when the voltage drops to about 0.9 V. [13] Cells connected in series produce a voltage equal to the sum of the voltages of each cell (e.g., three cells generate about 4.5 V when new).

  7. Liquid rheostat - Wikipedia

    en.wikipedia.org/wiki/Liquid_rheostat

    The fully salt-water load bank dates from an earlier, less regulated and litigious era. To pass current safety legislation, a more enclosed design is required. They are no more dangerous than electrode heaters , which work on the same principle, but with plain water, or electrical immersion heaters, provided the correct precautions are used.

  8. Multi-junction solar cell - Wikipedia

    en.wikipedia.org/wiki/Multi-junction_solar_cell

    The favorable values in the table below justify the choice of materials typically used for multi-junction solar cells: InGaP for the top sub-cell (E g = 1.8–1.9 eV), InGaAs for the middle sub-cell (E g = 1.4 eV), and Germanium for the bottom sub-cell (E g = 0.67 eV). The use of Ge is mainly due to its lattice constant, robustness, low cost ...

  9. Mercury battery - Wikipedia

    en.wikipedia.org/wiki/Mercury_battery

    The mercury oxide-zinc battery system was known since the 19th century, [3] but did not become widely used until 1942, when Samuel Ruben developed a balanced mercury cell which was useful for military applications such as metal detectors, munitions, and walkie-talkies.

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