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How does the resistance of a wire vary with its area of cross section'?
Wiki User
∙ 9y ago
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.
Dahlia Miller
Wiki User
∙ 7y agoOther things being equal, a larger cross section will result in less resistance.
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How does resistivity vary if length and area are doubled?
if length is doubled then resistivity increases&when area is doubled resistivity decreases.
How does the resistance of a wire vary with its lenght?
If the wire's cross-section area is constant, then its resistance per unit length is constant, and the total resistance should be directly proportional to the length of a wire segment.
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.
How does the resistance of a wire vary with its diameter?
At a greater diameter, the cross-section will also be greater, and therefore the resistance will be less. This assumes that other things are equal, of course.
Why is the formula for the cylinder pie times radius squared times h?
There really isn't a "why"; that's just how things are. The volume of any solid with a cross-section that does not vary with height is the area of the base multiplied by the height.
What is the name of an instrument used to vary electrical resistance?
Rheostat is the name of an instrument used to vary electrical resistance.
Can you represent electrical conductivity by finding its electrical resistance?
Conductivity is the reciprocal of resistivity, and is expressed in siemens per metre (S/m). Resistivity and, therefore, conductivity vary with temperature so are usually quoted at a specified temperature.Resistance is expressed in ohms. If you accurately measure the resistance, length, and cross-sectional area of a conductor, then you could determine its resistivity and, from that, its conductivity.
Does the voltage that runs through different appliances vary according to the resistance of the appliances?
No, it is the current (amperes) that vary according to the resistance.
How does the resistance of a wire vary with its length?
resistance of wire increases with increases of length
Suppose that a current-carrying ohmic metal wire has a cross-sectional area that gradually becomes smaller from one end of the wire to the other. The current must have the same value in each section o?
The current will remain the same throughout, but the voltage gradient will vary.
How does resistance of metal vary with temperature?
The resistance of metals rises with increasing temperature. The resistance semiconducting materials falls with increasing temperature.
What is winding resistance of 247 MVA generating transformer?
it depends the manufaturer standard, nut usaually its above 20 M ohms .AnswerHow long is a piece of string? Transformers vary is size hugely, so it's quite impossible to provide a definitive answer to your question. But the resistance of a transformer's windings will be very low -certainly within the ohms or milliohm range, depending on the physical size (cross-sectional area and length) of the conductors. It's most-certainly not in the megohm range, as suggested in the original answer!
