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What are the Factors that determine resistance value of electrical material?
The factors that determine the resistance value of an electrical material are its length, cross-sectional area, temperature, and resistivity. A longer material will have higher resistance, while a larger cross-sectional area will result in lower resistance. The resistance of a material also changes with temperature, with most materials increasing in resistance as temperature rises. Finally, resistivity is an intrinsic property of the material that determines how strongly it resists the flow of electricity.
Describe how the resistance of a material is determined?
The resistance of a material is determined by its resistivity, which is a fundamental property of the material. Resistivity is a measure of how strongly a material resists the flow of electric current. It depends on the material's composition and its physical dimensions. The resistance of a material can be calculated using the formula: resistance = resistivity x (length / cross-sectional area).
Which common factor affect both resistance as well as resistivity and how?
Temperature is a common factor that affects both resistance and resistivity. An increase in temperature generally leads to an increase in resistance and resistivity of a material. This is because higher temperature causes more atomic vibrations and collisions within the material, hindering the flow of electrons and increasing resistance.
Does aluminum have lower resistance than copper?
No, aluminum has a higher resistance than copper.
How does an object length affect its electrical resistance?
As the length of an object increases, its electrical resistance also increases. This is because a longer object provides more path for the electrons to travel through, resulting in more collisions and a higher resistance to the flow of current. The relationship between length and resistance is directly proportional according to the formula R = ρ * (L/A), where R is resistance, ρ is resistivity, L is length, and A is cross-sectional area.
Is electrical resistance and electrical resistivity the same?
No, they are not the same. Electrical resistance is a measure of how much a material opposes the flow of electric current, while resistivity is a property of the material itself that determines its resistance. Resistivity is an intrinsic property of the material, while resistance depends on the dimensions and shape of the material.
What are the Factors that determine resistance value of electrical material?
The factors that determine the resistance value of an electrical material are its length, cross-sectional area, temperature, and resistivity. A longer material will have higher resistance, while a larger cross-sectional area will result in lower resistance. The resistance of a material also changes with temperature, with most materials increasing in resistance as temperature rises. Finally, resistivity is an intrinsic property of the material that determines how strongly it resists the flow of electricity.
What property determines which material you would use to cover an electrical cable?
The material's electrical insulation properties and fire resistance are key factors in determining the suitability for covering an electrical cable. Additionally, factors like flexibility, durability, and cost-effectiveness also play a role in material selection.
A material that has no electrical resistance?
That's a "superconductor".
What is the controlling resistance that determines the amount of heat flow through a composite wall?
The thermal resistance of the material with the highest resistance in the composite wall determines the amount of heat flow. Heat flow is restricted by the material with the highest resistance, which is often the material with the lowest thermal conductivity in the composite wall.
What is a material that loses its resistance to electrical flow at very low temperatures?
A material that loses its resistance to electrical flow at very low temperatures is called a superconductor. This phenomenon is known as superconductivity, where the material exhibits zero electrical resistance below a critical temperature.
What does not affect electrical resistance?
Electrical resistance is primarily determined by the material's properties (resistivity, temperature, dimensions) and not affected by factors like voltage or current. However, the type of material, temperature, and length can impact resistance.
What four things does electrical resistance depend on?
Electrical resistance depends on the material's resistivity, length, cross-sectional area, and temperature. Together, these factors affect how much a material resists the flow of electrical current.
The opposition to the movement of charges flowing through a material is called what?
The opposition to the movement of charges flowing through a material is called resistance. It is a property that determines how strongly a material resists the flow of electric current.
What is the relationship between resistance and temperature in electrical circuits?
In electrical circuits, the resistance of a material typically increases as its temperature rises. This relationship is known as temperature coefficient of resistance.
What are Ohms the measurement of?
Ohms are the unit of measurement for electrical resistance. It indicates how much a material resists the flow of electric current.
What is physical law of electrical kinetic resistance?
The physical law of electrical kinetic resistance states that when an electric current passes through a material, it encounters resistance due to the collisions of charge carriers (such as electrons) with atoms in the material. This resistance leads to the conversion of electrical energy into heat and limits the flow of current through the material.
