Why Does Resistance Decrease When You Increase Voltage?

Why does resistance decrease when you increase voltage?

Why Does Resistance Decrease When You Increase Voltage? 1

umm . that's one way to look at it, but that's not where it's really at. The real reason for the high voltage is to allow the power companies to use the thinnest possible wires to transmit electricity across long distances. They do this for two reasons: first, this means less copper is used. Second, the transmission line wires are lighter and do not need heavy support, and the supports can be spaced further apart. So, In order to get a lot of power transmitted across thin wires, the current must be small,which means the voltage has to be high. You can see this from the formula for power in terms of voltage and current: P = V x I, or, doing the algebra, V = P/I. Therefore, in order to transmit power P, using very small currents I, the resulting voltage V must be high. Also, very small currents mean smaller resistive losses which are given by I x I x R. The bottom line in this question is really to cut down the cost of putting up transmission lines, and keeping your electric bill down.

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what safety equipments do i need to use on high voltage ?? please help?

Flameproof overalls rubber gloves with leather outer gloves face visor safety hat rubber mat hot stick for applying grounds on deenergized equipment hv tester hot stick for voltage testing All only to used by certified operators.

Why Does Resistance Decrease When You Increase Voltage? 2

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ITU Fuat Kulunk High Voltage Laboratory

ITU Fuat Kulunk High Voltage Laboratory, located in Gumussuyu, Istanbul, is a high voltage laboratory that belongs to Istanbul Technical University. It is the first and largest high voltage laboratory in Turkey and is one of the largests of Europe. The Laboratory consists of three main blocks. It was founded by Prof. Dr. Franz Doppler in 1938 and reorganized by Prof. Dr. Fuat Kulunk, who is also the first dean of school of electrical and electronics engineering, in 1945. Impulse Voltage LaboratoryTest set: Impulse voltage generator (1 MV, 10 kJ). Alternating Voltage LaboratoryTest set: High voltage transformer (300 kV, 50 Hz, 50 kVA). DC Voltage SupplyThe ratings of dc high voltage generator set are 1 MV and 10 mA. Tesla TransformerThe ratings of a Tesla Transformer are 400-500 kV, 150-300 kHz.

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How to drive a high voltage (30V) signal from Raspberry Pi?

A transistor does well for this job like this, but if you are not going to continuously use it and voltage spikes are common, a relay with a flyback diode would do well too

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Ultra-high-voltage electricity transmission in China

Ultra-high-voltage electricity transmission (UHV electricity transmission) has been used in China since 2009 to transmit both alternating current (AC) and direct current (DC) electricity over long distances separating China's energy resources and consumers. Expansion of both AC and DC capacity continues in order to match generation to consumption demands while minimizing transmission losses. Decarbonization improvements will result from the replacement of lower efficiency generation, located near the coast, by more modern high-efficiency generation with less pollution near the energy resources.

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will using a too high voltage battery on an airsoft AEG ruin the motor and/or the gears?

It all depends on your gun and how high or low quality it is for example you should not use a 9.6 volt in a cheap electric gun under $100. Also if you have a plastic gearbox and upgrade to a metal gearbox you could change a variety of things in your AEG, which is more expensive than a battery but it does enhance the life and specs of your AEG. Hope this helps. :)

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Where is Electric ground comes in missiles and rockets using high voltages ?

There's a long, long wire that connect the missile to the earth. :-) No, serious, all the voltage are floating, but referred to the "chassis" or any equipotential point used as reference. I think that the principle is the same as in automotive (and in all battery-powered systems). Remember, voltage is always a difference (in Italian is common to see voltage indicated as the acronym "ddp", that means "differenza di potenziale", potential difference in english, and this really helps the understanding)

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How To Make A Spot Welder At Home Using High-Voltage Capacitor

Spot welders are an electrical tool that is used to weld two metallic plates together by the application of pressure & electrical current. Spot welding is used in a wide array of industries, which includes but is not limited to sheet metal & automotive industries; notably for the assembly of sheet steel vehicle bodies. They provide a strong weld & are easy to build with a small number of components. So, in this article, we will go over a step by step process on How To Make A Spot Welder Using a High-Voltage Capacitor. Spot welding makes use of the phenomenon of Resistance welding; Resistance welding is the joining of metals by applying pressure and passing electrical current for a length of time through the metal area which is to be joined, creating a strong & focused weld nugget. You will need the following parts to build this project. The following are the steps on 'How To make a spot welder'. BE EXTREMELY CAREFUL when working with 220V AC sources & high voltage capacitors. 1) Remove the leads of the two electrical probes & solder them on the ends of the 1.5mm insulated copper wire. 2) Make a hole on the cap of the empty plastic bottle & connect the end of the wires to a 2-terminal rail connector through the cap of the bottle. 3) Connect the ve & -ve terminal of the capacitor to the ve & -ve probes respectively, then put the capacitor & the power with in the plastic bottle & firmly secure the lid. 4) Place the metallic surface to be welded to another surface ( here we are using the metal terminal of a DC battery) on an insulative surface (preferably a plastic/wooden stand) 4) Welding: Wear gloves & safety goggles, place the two probes in the live & neutral terminals of a 220V AC for a few seconds to charge the capacitor. (DO NOT AT ANY POINT IN THIS PROJECT TOUCH THE METALLIC PART OF THE PROBES AFTER CHARGING THE CAPACITOR AS YOU CAN GET A DEADLY SHOCK.). Place one of the probes on the bottom metal piece & press the other probe on the top metal sheet. Some sparks will fly, after which you should see a secure weld nugget. Fully Discharge the capacitor after every weld. Spot welding utilizes the geometry of the welding electrodes to point the welding current at the required weld location, as well as the pressure to weld the workpieces together. Once sufficient resistance is produced, the materials set down and combine, and a secure weld is formed. • touch the metallic part of the probes after charging as it can give you a deadly shock. • touch the surface of the two metallic bodies while welding as it can give you a bad shock. • Discharge the capacitors fully after each spot weld. • Spot welders are commonly used in places such as automotive fabrication units & Metal sheet factories.

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