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When the cross-sectional area of a wire increases, the resistance decreases because there is more space for current to flow through, reducing the likelihood of collisions between electrons and the wire material. Conversely, if the cross-sectional area decreases, the resistance increases because the available space for the current to flow through is reduced, leading to more collisions and hindering the flow of electrons.
What else can I help you with?
Do bend in wire affect the resistivity?
Bending a wire can change its resistance due to changes in its length and cross-sectional area. However, resistivity, which is an intrinsic property of the material, remains constant regardless of bending.
What property changes if the size of an object changes?
The property of the object would change "solid, liquid, or gas"
What four factors determine the resistance of a material and give examples of each?
The four factors that determine the resistance of a material are resistivity (intrinsic property of the material), length (longer length increases resistance), cross-sectional area (smaller area increases resistance), and temperature (increases in temperature usually increase resistance). Examples could be copper with low resistivity, a longer wire having higher resistance, a thinner wire having higher resistance, and a material like a semiconductor having resistance affected by temperature changes.
How does the resistance change as the wire become thicker?
As the wire becomes thicker, the resistance decreases. This is because a thicker wire has more cross-sectional area, allowing more space for electrons to move, resulting in lower resistance to the flow of electrons. Thinner wires have higher resistance due to a smaller cross-sectional area, limiting the flow of electrons.
How air resistance changes motion?
Air resistance acts in the opposite direction to the motion of an object, slowing it down as it moves through the air. The force of air resistance depends on the speed and surface area of the object and can cause a decrease in velocity, a change in direction, and a shorter distance traveled. In some cases, air resistance can be significant enough to alter the trajectory or stability of an object in motion.
Why does the rate of descent change when you change the shape of paper?
When you change the shape of the paper, you are altering the air resistance that the paper experiences as it falls. A paper with a larger surface area will experience more air resistance, slowing down its descent compared to a paper with a smaller surface area. So, the rate of descent changes because of the differing air resistance acting on the paper.
How do you calculate injection pressure from product before injection molding?
By deviding the multification of line pressure and screw dia with the crosssectional area of hydralic cylinder piston.
The resistance of a wire depends on the?
The length, cross-sectional area, and resistivity. As resistivity changes with temperature, temperature indirectly affects resistance.
Do bend in wire affect the resistivity?
Bending a wire can change its resistance due to changes in its length and cross-sectional area. However, resistivity, which is an intrinsic property of the material, remains constant regardless of bending.
Why does the area of a rectangle change?
if you change the side length the area will change. It is possible to change them and not change the area. For example make side twice and long and the other half as long. But in general, if you change the lengths of the sides the area of the rectangle changes.
How will pressure of an object will change if its area is doubled?
It won't. The pressure within a hollow object may change if the surface area changes, hence the volume. The total pressure acting on the exterior of a solid object may change if the total surface area changes.
How will the pressure of an object change if area is doubled?
It won't. The pressure within a hollow object may change if the surface area changes, hence the volume. The total pressure acting on the exterior of a solid object may change if the total surface area changes.
How do you find length and crosssectional area of a wire given just resistancevolume and resistivity?
Resistance varies directly as length Resistance varies inversely as cross-sectional area Hence R varies as L and R varies as 1/A Thus R = r(L/A) where r is the coefficient of resistance of the wire. If the wire is of uniform cross section, then A = V/L where V is the volume of the wire. Hence now we have R = r(L/(V/L)) or R = r(L-squared/V) or L-squared = (RxV)/r and so the answer would be L = square-root of (RxV)/r
Why does the area change when the length of a rectangle changes?
The area of a rectangle is calculated by multiplying its length by its width (Area = Length × Width). When the length changes, the product of the length and width also changes, resulting in a different area. If the width remains constant and the length increases or decreases, the overall area will increase or decrease accordingly. Thus, any change in length directly affects the rectangle's area.
How does area change when the length changes?
When length gets longer the area will be larger. As the length gets shorter the area will be smaller.
What property changes if the size of an object changes?
The property of the object would change "solid, liquid, or gas"
What kinds of changes occur as an air mass moves over an area?
there could be a temperature change, or a physical change.
