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What are some ways a material's electrical resistance is used to accomplish a certain job?
Wiki User
∙ 14y ago
A good example of electrical resistance is the heating element on a stove top it is a very poor conductor (high electrical resistance) because it is a poor conductor the electrical energy is converted to heat. Glass is one of the best insulators because its electrical resistance is so high it is a non conductor this lets us use it on high power lines to keep the electricity from coming in contact with the ground.
Wiki User
∙ 14y ago
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Why is there gold in circuit boards?
firstly, Only on Certain circuit boards. secondly, gold is a malleable, non-corroding/rusting conductive metal. gold has the lowest resistance to the flow of electricity through it; this side of a superconductor.
Do thunderstorms hurt your computer?
I do, I guess it really all depends on how prepared are you to deal with a disaster should it happen, and or how much protection you have. I have lightning protection on several points of my roof, and have invested in voltage regulators and UPSes.
Can screen printing be done on any kind of material?
Screen printing can be done on a wide variety of materials, making it a versatile and popular printing method. However, the success of screen printing on a particular material depends on factors such as the type of ink used, the characteristics of the material, and the intended use of the printed item. Here are some common materials on which screen printing is often applied: Textiles and Apparel: Materials: Cotton, polyester, blends, nylon, spandex, and other fabric types. Applications: T-shirts, hoodies, jerseys, hats, bags, and other clothing items. Paper and Cardboard: Materials: Various paper types, cardstock, and cardboard. Applications: Posters, packaging, greeting cards, and other paper-based products. Plastics: Materials: PVC, acrylic, polycarbonate, and other plastic substrates. Applications: Signs, labels, decals, and promotional items. Metal: Materials: Aluminum, stainless steel, and other metal surfaces. Applications: Metal signs, nameplates, and industrial labels. Glass: Materials: Glass surfaces and containers. Applications: Glass bottles, glassware, and decorative items. Wood: Materials: Plywood, MDF, and other wooden surfaces. Applications: Wooden signs, artwork, and promotional products. Ceramics: Materials: Ceramic tiles, mugs, and other ceramic surfaces. Applications: Decorative tiles, personalized mugs, and ceramic products. Leather: Materials: Genuine leather and synthetic leather. Applications: Leather goods such as belts, wallets, and accessories. Canvas: Materials: Canvas fabric. Applications: Art prints, canvas bags, and other fabric-based products. Flexible and Rigid Plastics: Materials: Polyethylene, polypropylene, and other plastic materials. Applications: Packaging materials, plastic containers, and promotional items. While screen printing can be applied to a broad range of materials, it's important to consider the specific characteristics of each material and select the appropriate ink and curing process. For example, certain inks are formulated to adhere well to specific substrates, and the curing temperature may vary depending on the material. Additionally, advancements in screen printing technology, ink formulations, and curing methods continue to expand the range of materials that can be successfully screen printed. Always follow the guidelines provided by ink and equipment manufacturers for the best results on a specific material.
What is Current Derating?
Every electrical component has a rated steady state current specified at a certain ambient temperature (in most cases 40 degC). This is the "continuous" current carrying capacity of the component at the rated operating temperature. If the actual ambient tempertature in the operating area is higher than the rated ambient temperature then the "continuous" current carrying capacity of the component is reduced. This happens due to the physical property of metals which causes the resistance of the matal to increase with the increase in temperature. Example: A component rated at 8A @ 40 deg C will be rated at >7A at 50 deg C. At 50 deg C you can still pass all 8A through the component but it will genenrate more heat and can eventually burn out.
What is the main long-term effect of high temperatures on computer components?
Generally, subjecting computer components to greater temperatures than they were optimally designed to withstand can ultimately result in permanent damage to certain parts of the machine. When one considers that much of the most important components are often made of wafer-thin components glued and soldered together, sometimes with electrical conducting paths less than a millimeter apart, it is easy to see why any kind of force that could warp the materials or "cook" them for extended periods of time could cause permanent damage to the computer.
How are the magnets able to have zero resistance?
If you mean zero electrical resistance for an electromagnet, this is possible with superconductivity. This can be achieved for certain materials at fairly low temperatures - typically a few kelvin.
What is the pairing mechanism behind high-temperature superconductivity?
The pairing mechanism behind high-temperature superconductivity is the ability of certain materials to conduct electricity with zero electrical resistance.
What happens to the materials when cooled?
If they get cold enough, they may change their phase; mainly, from gas to liquid, or from liquid to solid. Also, in most cases materials tend to use up less volume when they are cooled. Other properties also change, such as electrical resistance - one interesting case is superconductivity, where certain materials suddenly have ZERO RESISTANCE below a certain temperature.
What is the definition of equivalent resistance?
Equivalent series resistance (ESR) is an effective resistance that is used to describe the resistive parts of the impedance of certain electrical components.
What materials transfer electrical current?
All metals, and certain other materials such as carbon and salt water.
What are crystalline structures that conduct electricity without resistance when cooled to a certain temperature?
Superconducting materials.
Under what conditions do certain materials become superconductors?
Low temperature is a factor to increase electrical conductivty.
What is temperature coefficient for insulator?
"Temperature coefficient" means, how does a certain physical quantity vary, depending on the temperature. In this case, the physical quantity in question is probably the electrical resistance, or the electrical resistivity.
Why is heat observed when current flows through the circuit?
The heat observed in a circuit is the result of electrical resistance.Under normal circumstances, every electrical circuit has a certain amount of resistance to the flow of electricity. Electronflow opposed by the physical nature of the conductor. This is the fundamental nature of electrical resistance. Whenever this happens, the energy of those electrons is absorbed by the conductor (as opposed to flowing through) which then emitts this captured energy as heat. The higher a conductor's resistance, the more electrical energy is converted to heat by it.
What is the electrical resistance measured in?
Resistance is the opposition to the flow of electrons (i.e. electrical current) in a conducting material such as a metal wire or a pair of contacts in a switch. Every substance has a certain amount of resistance. Resistance is measured in ohms. If one volt can push 1 amp of current through a substance, it has a resistance of 1 ohm. Some materials, like copper and aluminum have fairly low resistance, and are therefore used as electrical conductors (wires). Another answer Conductor resistance means a material's opposition to the flow of current that a conductor has. Ideally, in a wire, this should be nothing, i.e. 0 ohms, but in reality all conductors have a certain amount of resistance. For example, 1000 feet of 14 AWG (the common wire size used for 15 amp branch circuits in residential wiring in North America) has about 2.5 ohms of resistance. Further answers Think of a conductor as a resistor/resistance of a certain very low value in series with whatever load it is feeding. Current flowing through the conductor(s) will result in a voltage drop and power loss, manifested as heating of the conductors. The "line loss" formula is one variation of the power formula and is P = I2 x R, which can be used for calculating the power loss in the conductors. Remember that any power line to a 120 volt device has 2 lengths of conductor going to it (hot and neutral return). Therefore the total conductor length is the length of the power cord or electrical cable times 2. To calculate the voltage drop across the conductor resistance for a given current, you have to determine the conductor's resistance and use Ohm's law. Calculating the resistance of a length of conductor can be done using tables readily available in textbooks or via a websearch, assuming copper conductors at 20 degrees Celcius. You need to know the size of the conductor (AWG size, for American wire gauge) and the length of the conductor.
What do you line furnaces with?
Furnaces are lined with materials in various formats but basically must possess an inherent Resistance to hot environments . These REFRACTORY materials might also need resistance to certain chemicals , gases or even molten metals . They are often of alumino silicate composition but can be pure compounds such as alumina .
How superconductivity relates to ohm's law?
Ohm's law states that the current flowing through a conductor is directly proportional to the voltage applied across it and inversely proportional to its resistance. Superconductivity is a property observed in certain materials where they exhibit zero electrical resistance below a critical temperature. In superconductors, Ohm's law is not applicable as there is no resistance to impede the flow of current, resulting in the potential for an infinite current to flow in a closed circuit without needing a voltage difference.
