# Effect of Increasing Wire Width on Resistance

• scotty0409
In summary, increasing the width of a wire results in a decrease in resistance due to the increased area of the conductor. This can be explained by the general equation R = (pL)/A, where p is the static resistivity of the material and L is the length of the wire.

#### scotty0409

What is the effect of increasing the width of a wire on it's resistance, and why?

Thanks
Neil

What do you think? Do you know the structure of a metal/solid?

Does it decrease because there are more electrons to move freely?

scotty0409 said:
Does it decrease because there are more electrons to move freely?

You pretty much got it. Just think of a pipe where you can vary the diameter to affect the water flow.

ok thanks for the help

So now that you've figured it out with help from ranger, here is the general equation that you should memorize (yes, there are a handful of equations that you should memorize):

$$R = \frac{\rho L}{A}$$

So an increase in the "width" of a conductor increases the area of the conductor, which does what?

berkeman said:
So now that you've figured it out with help from ranger, here is the general equation that you should memorize (yes, there are a handful of equations that you should memorize):

$$R = \frac{\rho L}{A}$$

So an increase in the "width" of a conductor increases the area of the conductor, which does what?

Sorry, but what does pL represent?

p = static resistivity of material and L = length of specimen.

## 1. What is the effect of increasing wire width on resistance?

Increasing the width of a wire will decrease its resistance. Resistance is inversely proportional to the cross-sectional area of a wire, so as the wire gets wider, the resistance decreases.

## 2. How does increasing wire width affect the flow of electricity?

Increasing wire width allows for more electrons to flow through the wire, resulting in a higher current. This is because a wider wire has a larger cross-sectional area, providing more space for electrons to move through.

## 3. Is there a limit to how much increasing wire width can decrease resistance?

There is a limit to how much increasing wire width can decrease resistance. This is because the resistance of a wire is also dependent on the material it is made of and its length. While increasing the width can decrease the resistance, other factors may limit how much the resistance can be reduced.

## 4. How does increasing wire width affect the temperature of the wire?

Increasing wire width can also affect the temperature of the wire. A wider wire has a lower resistance, which means less energy is lost as heat. This can help prevent the wire from heating up too much and potentially melting or causing a fire.

## 5. What are some practical applications of understanding the effect of increasing wire width on resistance?

Understanding the effect of increasing wire width on resistance is important in many practical applications. For example, it can help in designing circuits with specific levels of resistance or in choosing the appropriate size of wire for different electrical systems to prevent overheating. It is also important in industries such as telecommunications, where wires with different widths are used to control the flow of electricity and prevent signal interference.