Nichrome is an alloy used for making electric heater wires. A nichrome wire of diameter 0.50 mm is o be used for this purpose. In operating conditions, the temperature of the wire is 968 °C, and the power of the electric heater is 1.5 kW. The potential difference applied to the heater wire is 110 rolts. What should be the resistance (in ohms) of the wire at room temperature (20°C)? Electrical resistivity of nichrome at 20°c= 1.0 x 10-6 Qm Temperature coefficient of resistivity = 0.4 x 10-3 C-1

Nichrome is an alloy used for making electric heater wires. A nichrome wire of diameter 0.50 mm is o be used for this purpose. In operating conditions, the temperature of the wire is 968 °C, and the power of the electric heater is 1.5 kW. The potential difference applied to the heater wire is 110 rolts. What should be the resistance (in ohms) of the wire at room temperature (20°C)? Electrical resistivity of nichrome at 20°c= 1.0 x 10-6 Qm Temperature coefficient of resistivity = 0.4 x 10-3 C-1