A wire 3.00 m long and 0.450 mm2 in cross-sectional area has a resistance of 40.2 Ω at 20.0°C. If its resistance increases to 40.9 Ω at 27.5°C, what is the temperature coefficient of resistivity? (°C)−1
A wire is 0.79 m long and 0.77 mm2 in cross-sectional area. It carries a current of 4.1 A when a 2.0 V potential difference is applied between its ends. Calculate the conductivity ? of the material of which this wire is made.
A wire is 0.79 m long and 0.82 mm2 in cross-sectional area. It carries a current of 3.8 A when a 2.4 V potential difference is applied between its ends. Calculate the conductivity σ of the material of which this wire is made.
A wire is 1.3 m long and 0.93 mm2 in cross-sectional area. It carries a current of 5.8 A when a 1.8 V potential difference is applied between its ends. Calculate the conductivity σ of the material of which this wire is made.
A particular wire has a resistivity of 2.1*10^-8 Ω · m and a cross-sectional area of 2.9*10^-6 m2. A length of this wire is to be used as a resistor that will receive 41 W of power when connected across a 20-V battery. What length of wire is required? _________km
A wire 2.60 m long with a cross-sectional area of 7.07x10-6 m2 is connected to a 30.0 V power supply. If a current of 12.0 A is measured in the wire, a) what is the resistivity of the wire in ohm-meters? Answer in scientific notation. b) If this resistivity had been measured at 20.0 °C, what temperature, in Celsius, would we need to heat/cool the wire to for the resistance to be 4.25 Ω if the temperature coefficient of resistivity...
A 3.00 m length of copper wire at 20°C has a 1.20-m-long section with diameter 1.40 mm and a 1.80-m-long section with diameter 0.70 mm. There is a current of 2.3 mA in the 1.40-mm-diameter section. Part A What is the current in the 0.70-mm-diameter section? Express your answer in milliamperes. ΑΣΦ ? 12 = mA Submit Request Answer Part B What is the magnitude of Ē in the 1.40-mm-diameter section? Express your answer in volts per meter. ΜΠ ΑΣφ...
The resistance of a 50 m long copper wire is 0.267 Ω at 20 °C. Calculate the diameter of the wire. The resistivity of copper is 1.68 x 10-8 Ωm.
A 3.00-m length of copper wire at 20 ∘C has a 1.20-m-long section with diameter 1.2 mm and a 1.80-m-long section with diameter 0.60 mm . There is a current of 3.0 mA in the 1.2 mm -diameter section. A)What is the current in the 0.60 mm -diameter section? B)What is the magnitude of E⃗ in the 1.2 mm -diameter section? C)What is the magnitude of E⃗ in the 0.60 mm -diameter section? D)What is the potential difference between the ends of...
1. What is the resistance of a 450 m long copper wire that has a cross-sectional area of 3.00 x 10–6 m2?