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  2. Lightning (connector) - Wikipedia

    en.wikipedia.org/wiki/Lightning_(connector)

    Most Lightning devices only supported USB 2.0, which has a maximum transfer speed of 480 Mbit/s or 60 MB/s. With USB 2.0, only one lane is in use at a time. [21] [22] Only the 12.9-inch iPad Pro (1st and 2nd generation) and 10.5-inch iPad Pro support USB 3.0 (now USB 3.2 Gen 1), which has a maximum transfer speed of 5 Gbit/s or 625 MB/s. [9]

  3. N connector - Wikipedia

    en.wikipedia.org/wiki/N_connector

    Passband. 0–11 GHz, often up to 18 GHz. Type N connector (female) The N connector (also, type-N connector) is a threaded, weatherproof, medium-size RF connector used to join coaxial cables. It was one of the first connectors capable of carrying microwave -frequency signals, and was invented in the 1940s by Paul Neill of Bell Labs, after whom ...

  4. p–n junction - Wikipedia

    en.wikipedia.org/wiki/P–n_junction

    A p–n junction is a combination of two types of semiconductor materials, p-type and n-type, in a single crystal. The "n" (negative) side contains freely-moving electrons, while the "p" (positive) side contains freely-moving electron holes. Connecting the two materials causes creation of a depletion region near the boundary, as the free ...

  5. Negative refraction - Wikipedia

    en.wikipedia.org/wiki/Negative_refraction

    Negative refraction. Negative refraction is the electromagnetic phenomenon where light rays become refracted at an interface that is opposite to their more commonly observed positive refractive properties. Negative refraction can be obtained by using a metamaterial which has been designed to achieve a negative value for (electric) permittivity ...

  6. Type 2 connector - Wikipedia

    en.wikipedia.org/wiki/Type_2_connector

    three-phase AC / DC-mid. Combo 2 extension adds two extra high-current DC pins underneath and does not use the AC pins. The IEC 62196 Type 2 connector (often referred to as Mennekes for the company that designed it) is used for charging electric vehicles, mainly within Europe, as it was declared standard by the EU.

  7. Triboelectric effect - Wikipedia

    en.wikipedia.org/wiki/Triboelectric_effect

    e. The triboelectric effect (also known as triboelectricity, triboelectric charging, triboelectrification, or tribocharging) describes electric charge transfer between two objects when they contact or slide against each other. It can occur with different materials, such as the sole of a shoe on a carpet, or between two pieces of the same material.

  8. Extrinsic semiconductor - Wikipedia

    en.wikipedia.org/wiki/Extrinsic_semiconductor

    The term n-type comes from the negative charge of the electron. In n-type semiconductors, electrons are the majority carriers and holes are the minority carriers. A common dopant for n-type silicon is phosphorus or arsenic. In an n-type semiconductor, the Fermi level is greater than that of the intrinsic semiconductor and lies closer to the ...

  9. 1 + 2 + 3 + 4 + ⋯ - Wikipedia

    en.wikipedia.org/wiki/1_%2B_2_%2B_3_%2B_4_%2B_%E...

    The first four partial sums of the series 1 + 2 + 3 + 4 + ⋯.The parabola is their smoothed asymptote; its y-intercept is −1/12. [1]The infinite series whose terms ...