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2. Skid plate - Wikipedia

   en.wikipedia.org/wiki/Skid_plate

   A skid plate is an abrasion-resistant material affixed to the underside of a vehicle or boat [1] to prevent damage to the underside when contact is made with the ground. Skid plates may be used on off-road vehicles, motorcycles and lowered vehicles to prevent damage to the underside. Fake skid plates are also added to vehicles for an off-road ...

3. Resistor - Wikipedia

   en.wikipedia.org/wiki/Resistor

   For example, a 10 ohm resistor connected in parallel with a 5 ohm resistor and a 15 ohm resistor produces ⁠ 1 / 1/10 + 1/5 + 1/15 ⁠ ohms of resistance, or ⁠ 30 / 11 ⁠ = 2.727 ohms. A resistor network that is a combination of parallel and series connections can be broken up into smaller parts that are either one or the other.

4. Potentiometer - Wikipedia

   en.wikipedia.org/wiki/Potentiometer

   If only two terminals are used, one end and the wiper, it acts as a variable resistor or rheostat. The measuring instrument called a potentiometer is essentially a voltage divider used for measuring electric potential (voltage); the component is an implementation of the same principle, hence its name.

5. Varistor - Wikipedia

   en.wikipedia.org/wiki/Varistor

   A varistor (a.k.a. voltage-dependent resistor (VDR)) is a surge protecting electronic component with an electrical resistance that varies with the applied voltage. [2] It has a nonlinear, non-ohmic current–voltage characteristic that is similar to that of a diode. Unlike a diode however, it has the same characteristic for both directions of ...

6. Lightning arrester - Wikipedia

   en.wikipedia.org/wiki/Lightning_arrester

   Powerline worker performs maintenance of a lightning arrester on an electrical transmission tower in New Brunswick, Canada. A lightning arrester (alternative spelling lightning arrestor) (also called lightning isolator) is a device, essentially an air gap between an electric wire and ground, used on electric power transmission and telecommunication systems to protect the insulation and ...