(a) Using the data in Table 18 1, compute the resistance of a copper wire 3 mm (0 12 in ) in diameter and 2 m (78 7 in ) long (b) What would be the current flow if the potential drop across the ends of the wire is 0 05 V (c) What is the current density (d) What is the magnitude of the electric field across the ends of thewire Electrical Conductivity (2 m) Metal 6 8 x 107 6 0 x 107 4 3 x 107 3 8 x 107 1 6 x 10 1 0 x 10' 0 94 x 107 0 6 x 10 0 2 x 107 Silver Copper Gold Aluminum Brass (70Cu 30Zn) Iron Platinum Plain carbon steel Stainless steel

Question: (a) Using the data in Table 18.1, compute the resistance of a copper wire 3 mm (0.12 in.) in diameter and 2 m (78.7 in.)

(a) Using the data in Table 18.1, compute the resistance of a copper wire 3 mm (0.12 in.) in diameter and 2 m (78.7 in.) long.

(b) What would be the current flow if the potential drop across the ends of the wire is 0.05 V?

(d) What is the magnitude of the electric field across the ends of thewire?

Electrical Conductivity |(2-m)-| Metal 6.8 x 107 6.0 x 107 4.3 x

Electrical Conductivity |(2-m)-| Metal 6.8 x 107 6.0 x 107 4.3 x 107 3.8 x 107 1.6 x 10 1.0 x 10' 0.94 x 107 0.6 x 10 0.2 x 107 Silver Copper Gold Aluminum Brass (70Cu-30Zn) Iron Platinum Plain carbon steel Stainless steel

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