# How does length of a wire affect the resistance?

## How does length of a wire affect the resistance?

First, the total length of the wires will affect the amount of resistance. The longer the wire, the more resistance that there will be. After all, if resistance occurs as the result of collisions between charge carriers and the atoms of the wire, then there is likely to be more collisions in a longer wire.

What happens when you stretch a wire?

When a wire is stretched, the internal reactive force kicks in and fights the stretch. As a result, work is being done to overcome this opposing force. The wire stores this work in the form of elastic potential energy. Stretching of wire is possible only due to the ductility property.

How will the resistance change if a given wire is stretched to double its length?

As the length of wire gets doubled, the cross-sectional area will become half of its previous value because volume of wire remains constant. Hence, we can see that the new resistance is four times the previous resistance.

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### Does resistance depend on length?

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.

What happens to resistance when length increases?

From the equation, we understand that resistance is directly proportional to the length of the conductor and inversely proportional to the crossectional area of the conductor. Doubling the length doubles the resistance.

Why do shorter wires offer the least resistance?

The relationship between resistance and wire length is proportional . 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.

## What happens to the resistivity of a wire if it is stretched a it will increase B it will decrease C first increases then decreases?

The Resistivity of the wire will not change with the change in length. Resistivity is a property of the wire, it doesn’t depend upon it’s length or cross-sectional area.

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What are the four things that affect the resistance of a wire?

There are 4 different factors which affect resistance:

• The type of material of which the resistor is made.
• The length of the resistor.
• The thickness of the resistor.
• The temperature of the conductor.

Does resistance decrease with length?

when you have longer length of wire, the current has to travel more distance, more the distance higher the number of obstacles it faces through its path. Therefore resistance increases with the length. When cross sectional area increases the space of the elctrons to travel increases(simply explained).

### Why does a longer wire have more resistance?

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 happens when you stretch a wire to make it longer?

1 Answer. As a wire gets longer its resistance increases, and as it gets thinner its resistance also increases because its cross sectional area decreases. Doubling the length will double the resistance, but the wire also must get thinner as it is stretched, because it will contain the same amount of metal in twice the length.

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How does the length of a wire affect the resistance?

resistance = resistivity × length / area. Therefore, if you stretch a (Copper) wire its cross sectional area A will decrease and length l will increase, both causing an increase in resistance R. Resistivity is a constant for Copper.

## What happens when a conductor is stretched to double its length?

However, if a conductor ( say copper, because that’s what I know about) is stretched to double its length, the metal will harden from the process of diameter reduction and lengthening. This is, in fact, the process for making wire…. the diameter is reduced while the wire is pulled and stretched through a steel or diamond drawing die.

What happens to the cross sectional area when a wire is stretched?

The resistance R is directly proportional to lenght of a wire and inversely proportional to it’s cross sectional area. Therefore, If the length of the wire is stretched uniformly to 2 times its original length, then the cross-sectional area is reduced to 1/2 times because the volume ( V = AL) remains the same.