Which material has the highest resistance?
Nichrome has the highest resistivity and shows the heating effect of electric current because of its high resistance, it opposes the flow of current and hence, it produces a lot of heat.
Insulators: Materials that present high resistance and restrict the flow of electrons. Examples: Rubber, paper, glass, wood and plastic.
A "short circuit" is best described as (a) a high resistance placed across a low voltage.
A high-resistance connection (HRC) is a hazard that results from loose or poor connections in traditional electrical accessories and switchgear which can cause heat to develop, capable of starting a fire.
Resistant materials are often sub categorised. For example, hardwood and softwood, thermosetting and thermoplastics, alloys and pure metals. Resistant materials require particular basic techniques to be used to enable materials to be measured, cut, shaped, joined, and finished when making products.
(a) The highest resistance is when the resistances are connected in series.
In general, metals are good conductors. So they offer less resistance to the flow of current. Thus, metals have very low resistivity.
Resistance is defined as the opposition to the flow of electrical current through a conductor. Two highly resistant metals are Aluminium and Tungsten.
First find the “nominal resistance,” or 470K in this case. Take the nominal value and multiply it by 1 + your tolerance, which is (1+0.1). Then take the nominal value and multiply it by 1 – tolerance, or (1-0.1). The highest possible value is 517 K.
The wires that can withstand the highest temperatures are nickel alloys – nickel chrome, nickel chromium 80/20 and nichrome 60/16. Resistance wires for less demanding temperatures are copper nickel and cupro-nickel, nickel iron and iron chrome aluminium (ICA).
Where are high resistances found?
High resistances are found in insulation resistance of cables & wires.
Wood which conducts poorly, is said to have high resistance. Because of its electrolyte (charged ion) content, salt water conducts well and has low resistance, while pure water conducts poorly and is said to have high resistance. When a material is conducting, it releases energy in the form of heat.
An easier way to explain resistance is to consider an example of a person in a crowded market struggling to go from one shop to another. This situation is certainly similar to an electron trying to make its way through a wire.
There are three types of resistance, Logical/Rational, Psychological/Emotional, and Sociological.
In the field of Design and Technology, 'resistant material' is the term used for materials such as wood, plastic and metal.
All materials have resistance. How much resistance a material has depends on the type of material, its width, its length, and its temperature. Resistance is a hindrance when a material is being used to transmit electric current. Resistance is helpful when a material is being used to produce heat or light.
Hence, the maximum resistance which can be made using five resistors each of 1/5 ohm is 1 ohm.
Sandia's materials science team has engineered a platinum-gold alloy believed to be the most wear-resistant metal in the world. It's 100 times more durable than high-strength steel, making it the first alloy, or combination of metals, in the same class as diamond and sapphire, nature's most wear-resistant materials.
The copper does not have a high resistance such as: Copper has the highest electrical conductivity rating of all non-precious metals. Its atoms vibrate less, and so they impede the flow of electrons less.
The resistance depends on the length, nature, material, and cross-sectional area of a wire.
Is an example of high resistive material?
Tungsten is a part of high resistivity materials.
Electrical resistance is measured in units of Ohms. Thus, the higher the electrical resistance an object has, the higher the Ohms.
Aluminum is also used in a variety of appliances. It has been known to have strong corrosion resistance, which is an excellent aid in ensuring a longer life for all electrical devices made of aluminum wire. It is also an effective and cost-effective solution.
Copper has a significantly lower electrical volume resistivity: 0.017241 (Ω x mm2)/m for copper, compared to 0.0282 (Ω x mm2)/m for aluminium . This difference is highly relevant for power cables.
If you want a low current in a circuit so that the fine wires are not damaged, it makes more sense to use a resistor with a high resistance. When more power is required, resistors are typically wire wound (a wire is wound several times to reach the desired resistance value).
A high resistance connection can occur in a circuit anywhere a cable or wire is joined. This will usually be at an accessory such as a socket-outlet, switch, light fitting, or junction box.
Then, nichrome wire will have more resistance than the copper wire.
Topping the list, graphene is the strongest materials known to humans. The transparent material is composed of a single layer carbon atom arranged in a triangular lattice and it's the basic structural element in charcoal, graphite and carbon nanotubes.
The copper does not have a high resistance such as: Copper has the highest electrical conductivity rating of all non-precious metals. Its atoms vibrate less, and so they impede the flow of electrons less.
Metals are good electrical conductors (high conductivity and low resistivity), while non-metals are mostly poor conductors (low conductivity and high resistivity).
What is the resistance of gold?
Gold's electrical resistivity is 0.022 micro-ohm m at 20 °C, and its thermal conductivity is 310 W m-1 K-1 at the same temperature. The corrosion resistance of gold is possibly one of its most valuable properties. Electrode potentials are a beneficial technique for signifying the propensity of metal to corrode.
From the options, an Aluminium wire of 8 m and 1 mm2 has the highest resistance. Staff Selection Commission will release the SSC JE EE 2023 Notification on 26th July 2023.
Scientists have found a mineral stronger than diamond Scientists have found a mineral stronger than diamond. They say lonsdaleite could be used to fortify industrial tools like drill bits and saw blades - AND teach us about the evolution of earth.
Diamonds remain the most scratch-resistant material known to humanity. Metals like titanium are far less scratch-resistant, and even extremely hard ceramics or tungsten carbide cannot compete with diamonds in terms of hardness or scratch-resistance.
Steel is the second strongest and the most widely used metal in the world. It's an alloy of iron and carbon and contains small amounts of manganese, sulfur, oxygen phosphorus and silicon. It is considered an essential metal in engineering and construction and one of the most recycled metals.