Resistance and Radii Relationship

[anshuman3105]

The resistance of wire A is four times the resistance of wire B. Calculate the ratio of the radii of the wires

 

[SammyS]

The resistance of wire A is four times the resistance of wire B. Calculate the ratio of the radii of the wires

Hello anshuman3105. Welcome to PF !

What have you tried?

Where are you stuck?

You need to show some effort towards obtaining a solution -- according to the rules of this Forum.


By the way, you n would need more information to solve this problem.

Please state the problem word for word as it was given to you.

Then give an attempt at a solution.

 

[anshuman3105]

I just don't know... :(
Please help.

 

[SammyS]

I just don't know... :(
Please help.

Please state the problem word for word as it was given to you.

Are the wires the same length?

Are they made of the same material?

 

[anshuman3105]

the wires have the same material and same cross-sectional area

 

[Saitama]

...same cross-sectional area

Are you sure about this?

 

[anshuman3105]

Yaaa...sure..!

 

[gneill]

Yaaa...sure..!

If they have the same cross-sectional area then they have the same radii and the ratio is fixed at 1:1. Any other information or details would be irrelevant. It therefore seems likely that you have either misinterpreted the question or are not providing the true problem statement for reasons we can only guess at.