Physics, asked by ganesh201pandey, 10 months ago

A copper wire has a diameter 0.5 mm and resistivity of 1.6 into 10 to the power minus 8 ohm metre what will be the length of this wire to make its resistance 10 ohm how much does the resistance change if the diameter is double ok​

Answers

Answered by harsharora111
2

Answer:

R = pho L / A

  • Length constant
  • R ~ 1/A ~ 1/d^2

Volume constant

v= A × L

L = v/a

R = pho V/A^2

R ~ 1/d^4

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