voltage-controlled negative resistance
51Melanin — Not to be confused with melamine, melatonin, or Melanotan (disambiguation). Melanin pigment (dark granular material center of image) in a pigmented melanoma. Pap stain. Melanin …
52Pockels effect — The Pockels effect, or Pockels electro optic effect, produces birefringence in an optical medium induced by a constant or varying electric field. It is distinguished from the Kerr effect by the fact that the birefringence is proportional to the… …
53Electroluminescence — Animation of LCD, both unlit and with electroluminescent backlight switched on …
54Compensation (engineering) — In engineering, compensation is planning for side effects or other unintended issues in a design. The design of an invention can itself also be to compensate for some other existing issue or exception. One example is in a voltage controlled… …
55Organic semiconductor — STM image of self assembled supramolecular chains of the organic semiconductor Quinacridone on Graphite. An organic semiconductor is an organic material with semiconductor properties. Single molecules, short chain (oligomers) and organic polymers …
56RC oscillator — Electronic oscillators are often designed around an LC tank circuit, a tuned circuit formed with an inductor and a capacitor. But use of an inductor is not a requirement. Instead, the tuned circuit can be built using just resistors and capacitors …
57building construction — Techniques and industry involved in the assembly and erection of structures. Early humans built primarily for shelter, using simple methods. Building materials came from the land, and fabrication was dictated by the limits of the materials and… …
58Capacitor — This article is about the electronic component. For the physical phenomenon, see capacitance. For an overview of various kinds of capacitors, see types of capacitor. Capacitor Modern capacitors, by a cm ruler Type Passive …
59electric motor — motor (def. 4). [1885 90] * * * Introduction any of a class of devices that convert electrical energy to mechanical energy, usually by employing electromagnetic phenomena. Most electric motors develop their mechanical torque by the… …
60Membrane potential — Differences in concentration of ions on opposite sides of a cellular membrane lead to a voltage called the membrane potential. Many ions have a concentration gradient across the membrane, including potassium (K+), which is at a high inside and a… …
