the resistance of a wire of length 80cm and of uniform area of cross-section 0.025cmsq., is found to be 1.50 ohm. Calculate specific resistance of wire in SI units, Help please

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08-07-2014
Physics

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the resistance of a wire of length 80cm and of uniform area of cross-section 0.025cmsq., is found to be 1.50 ohm. Calculate specific resistance of wire in SI units, Help please

Sagot :

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Luanaidn Luanaidn · Answer 1 · 2014-07-30T11:51:20-04:00

Luanaidn Luanaidn

30-07-2014

[tex]Specific\ resistance\ =resistivity\\ From\ formula\ on \ resistance:\ R= \frac{pL}{A}\ p-resistivity,\ L-length,\\ A-area\ of\ cross\ section\\ p= \frac{R*A}{L}= \frac{1,5Ohm*0,025*10^{-4}m^2 }{80* 10^{-2}m }=0,0003515625 Ohm*m[/tex]

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