A length of #8 copper wire (radius = 1.63 mm) has a mass of 24.0 kg and a resistance of 2.061 ohm per km (Ω/km). What is the overall resistance of the wire?

A wire is made of a material with a resis- tivity of 2.97138 x 10-8 2 · m. It has length 2.16443 m and diameter 0.20515 mm. What is the resistance of the wire? Answer in units of N.

If the 0.145 mm diameter tungsten filament in a light bulb is to have a resistance of 0.185 Ω at 20.0°C, how long should it be? The resistivity of tungsten at 20.0°C is 5.60  10-8 Ω · m

A metal wire 3.50 m long has a circular cross section of radius 0.54 mm and an end-to-end resistance of 70.0 Ohms. The metal wire is then stretched uniformly so that its cross-section is still circular but its total length is now 22.75 m. What is the resistance of the wire after stretching? (Units: Ohm.) (I keep getting 455 Ohm, but that is incorrect.)

A wire has a resistance of 21.0 Q. It is melted down, and from the same volume of metal a new wire is made that is three times longer than the original wire. What is the resistance of the new wire?

What is the resistance (in Ohms) of a wire made of a material with a resistivity of 4.6× 10-8Ω⋅ m if its length is 2.9 m and its diameter is 0.76 mm?

An iron wire has a resistance of 78.7. m ohm at 20 degrees Celsius. When the wire carries a current, the heat generated by the current causes the temperature of the wire to rise by 22 degrees Celsius. What is the change in the resistance of the wire? If its final current was 56.2 mA. what is your original current?

A gold wire with a circular cross-section has a mass of 1.30 g and a resistance of 0.770 Ω. At 20°C, the resistivity of gold is 2.44 ✕ 10−8 Ω · m and its density is 19,300 kg/m3. How long (in m) is the wire? m What is the diameter (in mm) of the wire? mm

Resistance depends on the size and shape of a conductor. We expect a long wire to have higher resistance than a short one (everything else being the same) and a thicker wire to have a lower resistance than a thin one.  Resistance also depends on the intrinsic property of the conductor called the resistivity.  If the resistivity of a particular wire is 70.26x10-8 Ω ⋅ m, the wire is 44.47mm in length, and the radius of the diameter of the wire is 1.95m, what is the resistance of the wire in units of Ohms (Ω)?

A coil of wire has a resistance of 36.2Ω at 26 °C and 61.7Ω at 67 °C. What is the temperature coefficient of resistivity?