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A wire of resistivity p is stretched to double its length . What will be its new resistivity ?

 it's new resistivity is 4 times rho


  • -9
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it's resistivity is 4 times rho

  • -14

it will increase 4 times the resistivity in the first case

  • -17

the new resistivity will be 4 times of the earlier one....as if u will stretch something...it will increase its lenght but will decrease its area....on calculating R,=p.2l divided by 1/2a gives 4Rso R,=4R

  • -13
 there will be no change in resistivity because resistivity doesnt depend upon length and area of cross-section of wire
  • 47
resistivity=m/(ne2Ʈ) 

here length of a wire or a conductor is independent of resistivity
hence there will be no change in resistivity when wire is stretched to any length
  • 10
resistivity=m/(ne^2T)
​HERE length of a wire or a conductor is independent of resistivity
hence there will be no change in resistivity when wire is stretched to ayn length
 
  • 9
the Phase diffrence between the current the voltage at resonance will be

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what is the right ans
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Since, resistivity depends ONLY on "nature of material" and not on the dimensions of the conductor i.e. length and area of cross-section (of the conductor); hence the resistivity of the wire will NOT change. 
  • -7
Bahut marunga okkkkk
  • -6
no change in resistivity  because resistivity is not dependent on lenght
  • 15
Resistivity = ​ρ

The resistance is doubled as = R ∝ l

So,
It's resistivity will remain same;
                     ρ
∴,
New resistivity = ρ​
  • 20
The resistivity will remain the same because resistivity is a property that is independent of material cross section.
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Resistivity will remain the same because  resistivity is a property that is independent of material cross section.
  • -2
same
 
  • -7

The resistivity of a material does not change with dimensions. It depends on material and temperature.

Hence, by stretching a wire, there will be no effect on its resistivity. It will remain same.

  • 5
Since the resistivity depends on following two factors 1. Nature of conductor 2. Temperature Thus , length does not play a factor role in resistivity ..Hence , there will be no change in the resistivity
  • 7
No change becoz resistivity does not depend on length
  • -1
60W bulb because R is inversly proportional to p
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Resistivity of a wire depends upon the material of the wire.It is resistance which depends upon the length and area of cross section of the wire..so resistivity = ρ itself...
  • -4
A wire of resistivity p is pulled to double its length. What will be its new resistivity
  • -3
it will remain the same 
  • -2
There will be no change in resistivity because resistivity doesnt depend upon length and area of cross-section of wire. Resistivity only depends on nature of material.. Resistivity = ​ρ The resistance is doubled as = R ∝ l So, It's resistivity will remain same; ρ ∴, New resistivity = ρ​
  • -1
There is no change in the resistivity
  • 1
There is no change in the resistivity...
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There will be no change in resistivity as resitivity depends only on temperature and material  of  conductor.
Hope,It works, 
 
  • 2
The new resistivity will be 4 times of the earlier one....as if u will stretch something...it will increase its length but will decrease its area....on calculating R,=p.2l divided by 1/2a gives 4Rso R,=4R.
  • 1
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