A gold wire has a length of 36.0 m and a resistance of 4.80 Ω at 20.0°C. Assuming a circular cross-section, what is the wire's diameter (in mm)? The resistivity of gold at 20.0°C is 2.44 × 10^(-8) Ω · m.
Added by Danielle F.
Step 1
Step 1: Use the formula for resistance of a wire: \( R = \frac{\rho \times L}{A} \), where \( R \) is the resistance, \( \rho \) is the resistivity, \( L \) is the length of the wire, and \( A \) is the cross-sectional area. Show more…
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