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 is 5.25x10-3/°C.
a) ______ Ω m
b) ______ °C
A wire 2.60 m long with a cross-sectional area of 7.07x10-6 m2 is connected to a...
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
The resistance of a 1.50 m long copper wire, with a cross-sectional area of 7.06 x 10-6 m2, is measured at different temperatures starting at 20.0 oC and ending at 70.0 oC. The given table shows those resistances as a function of temperature differences from the initial temperature. Generate an accurate plot of the resistance as a function of DT. Determine the resistivity of copper from your plot and compare to the accepted value for copper’s resistivity. Determine the temperature...
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
Calculate the resistance of a piece of 20-gauge gold wire 2.20 m long. The cross-sectional area of 20-gauge wire is 0.5176 mm2. Resistivity for ("calculator" notation, in ohm*meter) - aluminium: 2.65 e-8 copper: 1.72 e-8 gold: 2.24 e-8 iron: 9.71 e-8 nichrome: 1.00 e-6 platinum: 1.06 e-7 silver: 1.59 e-8 tungsten: 5.65 e-8
A conductor is 10,000 m long and has a cross sectional area of 0.5 cm^2 Calculate the resistance of the wire when it is heated to 300 degree C given that the wire is initially at room temperature of 20 degree C and its coefficient of resistance is rho_0 = 1.72 times 10^-8 Ohm m The temperature coefficient of resistance alpha = 3.9 times 10^- 3/C at room temperature. 11.9 12.6 8.5 9.0.
A particular wire has a resistivity of 2.7 x 10-82. m and a cross-sectional area of 4.3 x 10-6 m2. A length of this wire is to be used as a resistor that will develop 45 W of power when connected across a 20-V battery. What length of wire is required? km
A copper wire of cross-sectional area 2.40 × 10-6 m2 and length 3.40 m has a current of 2.80 A uniformly distributed across that area. (a) what is the magnitude of the electric field along the wire? (b) How much electrical energy is transferred to thermal energy in 20.0 min?
1. A wire 2.0 m long and cross sectional area of 10-6 m2 is stretched 1.0 mm by a force of 50.0 N. Calculate: (a) The stress. (5.0 x 107 N/m2 ) (b) The strain. (5.0 x 10-4 ) (c) Young’s modulus of elasticity. (1.0 x 1011 N/m2) (d) The energy stored in the wire. (0.025 J)
A certain metal wire has a cross-sectional area of 1.0 cm2 and a resistivity of 1.7 × 10-8 Ω ∙ m. How long would it have to be to have a resistance of 1.0 Ω? Answers: A. 5.9 x 106 m B. 5.9 km C. 5.9 x 104 m D. 5.9 m E. 590 m
The resistivity of a 1.0 m long wire is 1.72 × 10-8 Om and its cross sectional area is 2.0 × 10-6 m2. If the wire carries a current of 0.20 A, what is the voltageacross the wire?a) 10 mVb) 17 mVc) 0.90 mVd) 1.7 mVe) 90 mV