Copper has a charge density of 8.5 x 102º electrons per m, and a resistivity of 1.7 × 10¬8 N·m. The drift velocity of electrons in copper is 1.4 × 10¬4 m/s. Determine the voltage drop across 1.0m of copper wire.

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Copper has a charge density of 8.5 × 1028 electrons per m', and a resistivity of
1.7 x 10-8 N.m. The drift velocity of electrons in copper is 1.4 × 10¬4 m/s. Determine the
voltage drop across 1.0m of copper wire.
Transcribed Image Text:Copper has a charge density of 8.5 × 1028 electrons per m', and a resistivity of 1.7 x 10-8 N.m. The drift velocity of electrons in copper is 1.4 × 10¬4 m/s. Determine the voltage drop across 1.0m of copper wire.
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resistivity of copper is = 1.7*10-8 ohm-meter

length of wire (L) =1 meter

cross-section area is (A)

Resistance of wire= resistivity* lenght/ area of cross-section = 1.7*10-8*1/A  =1.7*10-8/A  ohm

charge density of copper(n) = 8.5*1028 electrons/m3

charge of an electron = e= 1.6*10-19

drift velocity = 1.4*10-4m/sec

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