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What will the current-carrying capacity be if a conductor has a diameter of one half inch but there is a nick in one section so that the diameter of that section is one fourth inch?
Zanbabe
The resistance of such a conductor will be less than without such a nick. In other words, for the same voltage, you would get less current.
Wiki User
∙ 7y ago
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How Magnetism effect resistance?
Magnetism does not affect the resistance of a conductor. The factors affecting resistance are the conductor's length, cross-sectional area, and resistivity. As resistivity is affected by temperature, temperature indirectly affects resistance. However, the changing magnetic field surrounding a conductor carrying an AC current causes the current to flow closer to the surface rather than being distributed throughout the cross-section of the conductor. The greater the frequency, the greater this effect. This has the equivalent effect of reducing the cross-sectional area of the conductor, causing its resistance to rise. This is misleadingly called the 'AC resistance' of the conductor!
What happens to the resistivity of a conductor when it is made thinner and longer?
Resistance of wire increases wen we make it thin. Because R is inversely prop. To cross section area of wire.
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A profile is a cross section in soil.
When one section of a mineral is the same as another section of the same mineral it is said to be a what?
Homogeneous
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what is the minimum cross-section area should the cable have in order to just support thelift packed to capacity
What is the value of the resistance when both length and diameter are double?
Doubling the diameter of a circular-section conductor will quadruple its cross-sectional area and, therefore, reduce its resistance by a quarter. Doubling the length of a conductor will double its resistance. So, in this example, the resistance of the conductor will halve.
Why the cable size is expressed in Sqmm not in diameter regardless of single or stranded conductor?
The cross-sectional area is one of the factors that determines how much current a conductor can carry -this is regardless of the shape of that conductor's cross section (many conductors are not circular). So the diameter is of not much interest.
Do thick wires have high or low resistance?
Low resistance.AnswerSince resistance is inversely proportional to the cross-sectional area of a conductor, increasing the diameter ('thickness') of a conductor will reduce its resistance.For example, doubling the diameter of a circular-section conductor will quadruple its cross-sectional area, and reduce its resistance by one quarter.
What is the skin effect in transmission lines?
It is the tendency of alternating current to flow more in the outer part of the conductor than in the centre. This reduces the effective cross-section area of the conductor. For this reason conductors with a diameter of more than about 30 mm are uncommon.
How does the resistance of a wire vary with its area of cross section'?
Conversely, as the cross-sectional area of the conductor icreases, the resistance decreases, just as a pipe of large diameter offers less resistance to fluid flow than does a pipe of small diameter.
What is a sentence for the word conductor?
"The conductor forgot to lead the woodwind section in the third part."
What is filamentary conductor?
Filamentary conductor is the limiting case of cylindrical conductor of circular cross section as radius approaches zero.
When the diameter of a conductor is doubled what happens to its resistance?
Resistance will decreases... Because R is inversely proportional to Area of the conductor.AnswerIf the conductor has a circular cross-sectional area, then doubling the diameter will reduce the resistance to one quarter of its original distance. This is because area is proportional to the square of the radius, and resistance is inversely proportional to cross-sectional area.
Why wire size in square mm?
That would refer to the cross-section. A wire that has twice the diameter of another wire would have 4 times the cross-section - and therefore 4 times as much weight per meter, and 4 times as much current-carrying capacity.
Will an increase of applied voltage decrease the resistance of a copper conductor?
No, the resistance is fixed by the cross section and length of the conductor and does not vary with voltage.
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A 6-AWG wire has a diameter of 4.621 mm and a cross-section of 13.3 mm2. However a #6 wire used in wiring may contain more than one conductor to give flexibility, but its total cross-section area must be the same.
Factors affecting resistance of a metal conductor?
The material, the length, the cross section.
