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# How Does the Resistance of a Wire Change When: Its Material is Changed to One Whose Resistivity is Three Times? - CBSE Class 10 - Science

ConceptFactors on Which the Resistance of a Conductor Depends

#### 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

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