Nichrome wire,often used for heating elements,has resistivity of 1.0 × 10^-6 Ω • m at room temperature.What length of No.30 wire (of diameter 0.250 mm)is needed to wind a resistor that has 50 ohms at room temperature? A) 3.66 m B) 2.45 m C) 0.61 m D) 6.54 m E) 22.4 m

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The Answer of Nichrome wire,often used for heating elements,has resistivity of 1.0 × 10^-6 Ω • m at room temperature.What length of No.30 wire (of diameter 0.250 mm)is needed to wind a resistor that has 50 ohms at room temperature? A) 3.66 m B) 2.45 m C) 0.61 m D) 6.54 m E) 22.4 m

Nichrome Wire,often Used for Heating Elements,has Resistivity of 1