A copper wire has a length of 1.50 m and a cross sectional area of 0.380 mm2. If the resistivity of copper is 1.70 ✕ 10-8 Ω · m and a potential difference of 0.700 V is maintained across its length, determine the current in the wire (in A).

Question

Physics

Janet Lynn

26 July, 15:42

A copper wire has a length of 1.50 m and a cross sectional area of 0.380 mm2. If the resistivity of copper is 1.70 ✕ 10-8 Ω · m and a potential difference of 0.700 V is maintained across its length, determine the current in the wire (in A).

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Answers (1)

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Paloma Michael · Answer 1

Answer: 1.044 E - 17 A

Explanation:

L = 1.50m

A = 0.380mm = 3.8E - 7

Resistivity p = 1.70 E-8

R = pl/A

R = 1.70 E-8 * 1.5 / 3.8 E-7

R = 6.71 E-16 ohms

V = IR

0.700 = I * 6.71 E-16

I = 1.044E-17 A