A Copper wire has diameter 05 M M and resistivity
of 16 x 10-8 πM
what should be the length of time
wire fornatic its resistance 10π
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A Copper wire has diameter 05 M M and resistivity
of 16 x 10-8 πM
what should be the length of time
wire fornatic its resistance 10π
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Answer:
Given, diameter, d=0.5 mm
resistivity, ρ=1.6×10-⁸Ωm
Resistance, R=10 Ω
Let the length of wire be l.
A=πd²/4. R= pl/a = pl/rd²4. =>l= Rrd²/4p. l=10×3.14×(0.5×10-³)²4×1.6×10-⁸ l=122m. . R∝1/d²