#### Question

How does the resistance of a wire change when:

its material is changed to one whose resistivity is three times?

#### Solution

Resistance,

`R=l/A`

where *l* = length of wire

*A*= area of cross-section of the wire

When the material is changed to one whose resistivity is three times:

New resistivity, `p'=33rho`

The new resistance,

`R'=(rho^eta)/A`

`R=(3rho)/A=3R`

`R=(3rho)/A=3R`

Thus, the resistance will become three times the original resistance.

Is there an error in this question or solution?

Solution How Does the Resistance of a Wire Change When: Its Material is Changed to One Whose Resistivity is Three Times? Concept: Factors on Which the Resistance of a Conductor Depends.