How does cross-sectional area affect resistance?

How does cross-sectional area affect resistance?

Resistance is inversely proportional to cross-sectional-area. The bigger the cross sectional area of the wire the greater the number of electrons that experience the ‘electric slope’ from the potenetial difference.

What happens to the resistance of a conductor when the area of cross section of a conductor is halved?

The resistance of conductor is directly proportional to length and inversely proportional to area of cross section. When the length is doubled the area of cross section also gets doubled. When the area of cross section is halved then resistance becomes double .

What will happen to the resistance of the conductor if the cross-sectional area of a metallic conductor is halved and the length of the conductor is doubled?

The resistance of a conductor is directly proportional to its length (L) as R ∝ L. Thus doubling its length will double its resistance, while halving its length would halve its resistance. Also the resistance of a conductor is inversely proportional to its cross-sectional area (A) as R ∝ 1/A.

How does resistance of a conductor change with length and area of cross section?

Electrical resistance is directly proportional to the length (L) of the conductor and inversely proportional to the cross-sectional area (A). Resistance is inversely proportional to the area of cross-section. When the area of cross-section increases the resistance decreases and vice versa.

Why does resistance decrease with cross-sectional area?

Think of cross-sectional area as consisting of numerous individual wires in parallel. Adding more wires in parallel decreases the resistance of that circuit path. So, bigger cross sectional area = more wires in parallel = lower resistance.

Is resistivity directly proportional to area of cross section?

The resistance of a wire is directly proportional to its length and inversely proportional to its cross-sectional area. Resistance also depends on the material of the conductor.

Why area is halved when length is doubled?

Doubling the length of the conductor will double the resistance of the conductor, but the thickness of the conductor also must get halved as it is stretched, because it will contain the same amount of metal in twice the length. The volume of a cylinder is length multiplied by the cross-sectional area of the conductor.

What will happen to resistance if the length of the conductor is increased 1 point?

Answer: the resistance of a conductor is directly proportional to its length. so if length is increased then resistivity increases ande vice versa. so if length is doubled resistance will also get doubled i.e resistance is 4 times that of original resistance.

Which conductor has lowest resistance?

Element silver has lowest resistivity and hence has higher conductivity. Resistivity – Resistivity is equal to the resistance of a given conductor having a unit volume.

Do thicker wires have more resistance?

The moving electrons can collide with the ions in the metal. The resistance of a thin wire is greater than the resistance of a thick wire because a thin wire has fewer electrons to carry the current. The relationship between resistance and the area of the cross section of a wire is inversely proportional .

What happens to the resistance of a conductor when its?

Expert Answer: On increasing the area of cross-section, resistance decreases. This is because resistance is inversely proportional to area. Answered by | 3rd Dec, 2013, 03:30: AM

Why is the cross sectional area of a conductor Constant?

This is because: Where R is the resistance, ρ (the greek letter rho) is the resistivity of the material (which will remain constant if the material is kept the same, as it is a property of a material itself), and A is the cross sectional area of the conductor.

What happens to resistance when area of cross-section increases?

On increasing the area of cross-section, resistance decreases. This is because resistance is inversely proportional to area. This video explains the relation betweeen the resistivity and length of wir…

What happens if the diameter of a conductor is doubled?

Hence, if the length is doubled, then L will increase by a factor of 2, and if the diameter is doubled, then A will increase by a factor of 4 (this is because the area of a circle (and hence the If the conductor is the same, and thus has the same resistivity, and the conductor is cylindrical, then the resistance will halve.