
When a potential difference of 12 V is applied to a wire 6.6 m long and 0.33 mm in diameter the result is an electric current of 2.0 A . 1. What is the resistivity of the wire?
When a potential difference of 12 V is applied to a wire 6.6 m long and 0.32 mm in diameter the result is an electric current of 2.1 A . What is the resistivity of the wire?
1. A number 12 copper wire has a diameter of 2.053 mm. Calculate the resistance of a 37.0 m long piece of such wire. (Use 1.72×10-8 Ωm for the resistivity of copper.) Use the formula for resistance remembering that the diameter is specified rather than the radius. 2. For safety, the National Electrical Code limits the allowable amount of current which such a wire may carry. When used in indoor wiring, the limit is 20.0 A for rubber insulated wire...
a.) A 33.9-m length of copper wire at 20.0°C has a radius of 0.31 mm. If a potential difference of 7.00 V is applied across the length of the wire, determine the current in the wire. b.) If the wire is heated to 40.0°C while the 7.00-V potential difference is maintained, what is the resulting current in the wire?
(a) A 35.3-m length of copper wire at 20.0°C has a radius of 0.31 mm. If a potential difference of 7.0 V is applied across the length of the wire, determine the current in the wire. (Use the values in this table.) 1.48 A (b) If the wire is heated to 40.0°C while the 7.0-V potential difference is maintained, what is the resulting current in the wire?
(a) A 34.1-m length of copper wire at 20.0°C has a radius of 0.21 mm. If a potential difference of 8.00 V is applied across the length of the wire, determine the current in the wire. (Use the values in this table.) A (b) If the wire is heated to 40.0°C while the 8.00-V potential difference is maintained, what is the resulting current in the wire? A
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...
A 100 m copper wire 2 mm in diameter has a 1.0 A current inside. The copper wire is joined end to end to a 114 m long iron wire of the same diameter. Find the potential drop across the iron wire, ρIron = 9.7x10-8 Ω-m.
A copper wire has a diameter of 1.29x10^-3m. It carries a current density of 7.65x10^6A/m^2, which is assumed to be uniform over the cross section. (a) Calculate the current in the wire. (b) The copper has a conductivity of 5.8x10^7A/Vm with such a wire of 1 mile long, determine the resistance of the copper wire. (c) Determine the potential difference between the two ends of the wire with the current and resistance. (d) Determine the field intensity of E in...
A copper wire 10 m long must experience a voltage drop of less than 1.0 V when a current of 3.0 A passes through it. Using the data in Table 12.1, compute the minimum diameter of the wire. Table 12.1 Room-Temperature Electrical Conductivities for Nine Common Metals and Alloys Metal Electrical Conductivity (22-m)!) Silver 6.8 * 107 Copper 6.0 x 107 Gold 4.3 x 107 Aluminum 3.8 x 107 Brass (70 Cu-30 Zn) 1.6 × 107 Iron 1.0 x 107...