AnswersDriveNichrome Wire and Ribbon (80% Ni/20%Cr). Nichrome is a non-magnetic alloy of nickel and chromium. Nichrome is widely used in heating elements. It is wound in wire coils to a certain electrical resistance, and current passed through to produce heat.
Is Nichrome a conductor?
Nichrome is commonly wound up into coils and used in heating elements (devices that convert heat into electricity through Joule heating) such as hair dryers, toasters and ovens. However, nichrome wires are not used as much as copper wires (resistivity = 1.7 × 10−8 Ωm) due to the high cost of chromium.
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Why is Nichrome wire used as a heating element?
Metal heating elements. Nichrome: Most heating elements use nichrome 80/20 (80% nickel, 20% chromium) wire, ribbon, or strip. Nichrome 80/20 is an ideal material, because it has relatively high resistance and forms an adherent layer of chromium oxide when it is heated for the first time.
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Why Nichrome is not used as a bulb filament?
It can reach high temperature before melting and therefore emit a brighter light than nichrome can. Nichrome on the other hand, although it has a pretty high melting point (1673 K) it is not as high as tungsten, but it is often used for heating devices, such as a blowdryer.
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What is Nichrome wire made of?
Nichrome. Nichrome (NiCr, nickel-chrome, chrome-nickel, etc.) is any of various alloys of nickel, chromium, and often iron (and possibly other elements). The most common usage is as resistance wire, although they are also used in some dental restorations (fillings) and in a few other applications.
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Is Nichrome wire a good conductor of electricity?
With such a low resistivity and high boiling point, this makes nichrome a very good conductor of electricity and ideal material for making wires and other insulation devices. However, nichrome wires are not used as much as copper wires (resistivity = 1.7 × 10−8 Ωm) due to the high cost of chromium.
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Is Nichrome wire a resistor?
Nichrome, a non-magnetic 80/20 alloy of nickel and chromium, is the most common resistance wire for heating purposes because it has a high resistivity and resistance to oxidation at high temperatures. When used as a heating element, resistance wire is usually wound into coils.
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How hot does Nichrome wire get?
At lower temperatures, less current gives higher temperature rises. With your 38Ω piece of wire (Straightened out, not coiled) to 400°F, that is ~26V (not including resistance changes). (0.68 = 26V / 38Ω). 35°c is 95°F. That's slightly more than a fourth of 400°F. So try cutting the current to a 5th of that.
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Is a light bulb a type of resistor?
The reason a light bulb glows is that electricity is forced through tungsten, which is a resistor. The energy is released as light and heat. A conductor is the opposite of a resistor. Electricity travels easily and efficiently through a conductor, with almost no other energy released as it passes.
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How does the thickness of a wire affect its resistance?
The larger the cross sectional area, the lower the resistance since the electrons have a larger area to flow through. This will continue to apply no matter how thick the wire is. The electron flow will adjust itself to whatever the wire thickness is. Electricity is nothing but the flow of electrons through a material.
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Why does a thick wire has less resistance?
The longer a wire is the more resistance it has due to the longer path the electrons have to flow along to get from one end to the other. The larger the cross sectional area, the lower the resistance since the electrons have a larger area to flow through. This will continue to apply no matter how thick the wire is.
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What is the Ohm's law?
The potential difference (voltage) across an ideal conductor is proportional to the current through it. The constant of proportionality is called the "resistance", R. Ohm's Law is given by: V = I R where V is the potential difference between two points which include a resistance R.
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What is Ohm's law example?
This is called Ohm's law. Let's say, for example, that we have a circuit with the potential of 1 volt, a current of 1 amp, and resistance of 1 ohm. The amount of water in the tank is defined as 1 volt and the “narrowness” (resistance to flow) of the hose is defined as 1 ohm.
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What is Faraday's law?
Faraday's law of induction is a basic law of electromagnetism predicting how a magnetic field will interact with an electric circuit to produce an electromotive force (EMF)—a phenomenon called electromagnetic induction.
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What is a Lenz law?
Lenz's law is a common way to understand how electromagnetic circuits obey Newton's third law and the conservation of energy. Lenz's law is named after Heinrich Lenz, and it says: An induced electromotive force (emf) always gives rise to a current whose magnetic field opposes the change in original magnetic flux.
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What is the EMF?
The electromotive force (e) or e.m.f. is the energy provided by a cell or battery per coulomb of charge passing through it, it is measured in volts (V). It is equal to the potential difference across the terminals of the cell when no current is flowing.
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What is the meaning of MMF?
Similar to the way that electromotive force (EMF) drives a current of electrical charge in electrical circuits, magnetomotive force (MMF) 'drives' magnetic flux through magnetic circuits. The term 'magnetomotive force', though, is a misnomer since it is not a force nor is anything moving.
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What is zero EMF?
Low EMF (Electromagnetic Field) As the pioneer of low EMF carbon infrared sauna heaters, our patent-pending infrared heater technology reduces the EMF levels where you are sitting in the sauna to virtually zero. Our exclusive manufacturing process allows us to cancel out EMF to levels that are virtually undetectable.
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What are the effects of EMF exposure?
Electric and magnetic fields (EMFs) are invisible areas of energy, often referred to as radiation, that are associated with the use of electrical power and various forms of natural and man-made lighting. Ionizing: high-level radiation which has the potential for cellular and DNA damage.