A wire of resistivity is pulled to double its length.What will be its new resistivity?
Answers
Answered by
136
resistivity of a material does not depends on the lenghth and shape of the wire ...
It only depends on the material of wire ...
Resistance depends on the lenghth , diameter , and cross section area..
RESISTIVITY is the inbuilt property of a conductor...
It only depends on the material of wire ...
Resistance depends on the lenghth , diameter , and cross section area..
RESISTIVITY is the inbuilt property of a conductor...
Answered by
223
R=ρL/A
When L becomes 2L, A becomes A/2
New R=ρ 2L/A/2
=4 ρL/A
=4 R
New resistance becomes 4 times the original one.
But, resistivity remains the same as it is the property of the substance and does not change with length or area.
When L becomes 2L, A becomes A/2
New R=ρ 2L/A/2
=4 ρL/A
=4 R
New resistance becomes 4 times the original one.
But, resistivity remains the same as it is the property of the substance and does not change with length or area.
Similar questions