How does length and cross-sectional area affect resistance?

its length – the longer the wire, the greater its resistance. its cross-sectional area A – the greater the area, the less its resistance. the resistivity of the material r – the greater the resistivity, the greater its resistance.

How does resistance depend on cross-sectional area?

Resistance is Inversely proportional to cross sectional area.. Explanation: this is because, if area of cross section increases, there will be more area for flow of electrons in the direction opposite to current.. and thus resistance (opposition of flow of electrons) becomes low.

How is resistance affected by length?

First, the total length of the wires will affect the amount of resistance. The longer the wire, the more resistance that there will be. In the same manner, the wider the wire, the less resistance that there will be to the flow of electric charge.

What happens to resistance as cross sectional area increases?

On increasing the area of cross-section, resistance decreases. This is because resistance is inversely proportional to area.

Why does resistance decrease with cross sectional area?

when cross section increase, surface area of wire increase. More surface area leads to free flow of electrons. so electron flow easily and resistance decrease.

How does the resistance of a conductor depend on length of the conductor area of cross section of the conductor temperature of the conductor?

Answer: resistance is directly proportional to the length of the wire and inversely proportional to the area of cross section of the wire. if the temperature increases, the resistivity increases.

Why does resistance increase with length?

The moving electrons can collide with the ions in the metal. This makes it more difficult for the current to flow, and causes resistance. The resistance of a long wire is greater than the resistance of a short wire because electrons collide with more ions as they pass through.

What is the cross-section of resistance?

Resistance is directly proportional to length. The cross section area A. Resistance is inversely proportional to cross section area.

What are the factors that affect the resistance of a material?

There are four factors affecting resistance which are Temperature, Length of wire, Area of the cross-section of the wire, and nature of the material.

What happens to resistance of the conductor if length is doubled and area of cross-section halved?

Initial length of the conductor l1=l Final length of the conductor l2=2l Initial cross-sectional area A1=A Final cross-sectional area A2=2A The resistance of conductors given by R=ρ1A∝1A As both the length and area are doubled Hence, there will be no change in the resistance of the conductor and so it will remain …

Why is resistance directly proportional to length?

As the length is increased, the number of fixed positive ions increases and thus the collision of free electrons increases. This increases the resistance in a conductor. Thus, resistance is directly proportional to the length.

How does resistance depends on length and cross section of a conductor?

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. The resistance of a conductor, or circuit element, generally increases with increasing temperature.

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