The temperature coefficient of resistance at 30°C of a conductor is 0.003759. If it has a resistance of 1.25 Ohm at 25° C, determine its resistance at 40° C.
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- A certain batch of copper wire was found to have a conductivity of 98% at 20°C. What is its resistivity in u0-cm?For the conductor in the figure which has two different conductivities, 01>02. The power of the Joule losses in each of the pieces. This power is: (Justify the answer) - Higher in the part with higher conductivity. - Higher in the part with lower conductivity. - Equal in both pieces. - The response depends on other material parameters. 0₁ 02 PJI PJ210) A certain batch of copper wire was found to have a conductivity of 98% at 20°C. What is its resistivity in un-cm? www
- 10) A certain batch of copper wire was found to have a conductivity of 98% at 20°C. What is its resistivity in un-cm?A copper conductor has its specific resistance of 1.6 x 10^-16 ohm-cm at 0°C and a resistance temperature coefficient at 1/254.5 per °C . Find (a) specific resistance at 60°C and (b) the resistance temperature coefficient at 60°CA specimen of copper conductor has a resistivity of 1.6x10^-8 ohms -m at 0° C and it mean temperature coefficient is 0.00428/°C. Find the resistivity at 60°C (°K=273.5+ C).
- 10) A certain batch of copper wire was found to have a conductivity of 98% at 20°C. What is its resistivity in un-cm? 11) The resistance of a copper at 30°C is 500. If the temperature coefficient of copper at 0°C is 0.00427. What is the resistance at 100°C?Two conductors, one of copper and the other of iron, are connected in parallel and carry equalcurrents at 25°C. How many percent of the total current will the copper conductor carry if thetemperature is raised to 100°C? The temperature coefficients of resistance at 0 °C are 0.0043 /°Cand 0.0063 /°C for copper and iron, respectively.The resistance of copper wire with α = 0.00393/C° at 20°C is 64 Q. At 94 °C, its resistance would be about
- Find the 100 degree resistance of a coil wound from a conductor, since the resistance at 20 degrees is 100?We want to investigate how the field strength will be with air as dielectric and with steatite. A plate capacitor is placed in a 24 kV network between phase and ground. The relative permittivity of air is &=1 and for steatite &-6. The plate capacitor has area = 1m². The distance between the electrodes is 2 mm. Ep = 8.854-10-12 F/m A=1m² d=2mm a) Calculate the maximum field strength in the plate capacitor. (Answer: 9.8kV/mm) b) What is the capacitance of the capacitor if we use steatite? (Answer: C = 26.6nF)Determine the thermal coefficient of resistance of copper at 50°C, then use this value todetermine the resistance of copper wire at 170° if the resistance of this copper wire at 50°C is50ohms. The thermal coefficient of resistance of copper at O°C is 0.004264/C°