A carbon resistor dissipated 60 W of power from a 120 V source at 20°C. How much energy will be dispersed in the resistor at 120°C if connected across the same source? Assume the temperature coefficient of carbon at 20°C is -0.0005 per °C?
1. A carbon resistor dissipated 60 W of power from a 120 V source at 20°C. How much energy will be dispersed in the resistor at 120°C if connected across the same source? Assume the temperature coefficient of carbon at 20°C is -0.0005 per °C?
2. A conductor whose diameter is 0.175 inches has a resistance of 0.5 ohms. The wire is drawn through a series of dies until the diameter is reduced to 0.8 inches. Assuming the specific resistance of the material remains constant, what is the resistance of a lengthened conductor?
3. The resistance of a wire is 126.48 ohms at 100 degrees Celsius and 100 ohms at 30 degrees Celsius. Determine the temperature coefficient of copper at 0 degrees Celsius?
4. Three resistors of 6-ohm resistance are connected in delta. Inside the delta, another 6-ohm resistor is connected in wye. Find the resistance between any two corners.
5. An LRT car, 5 km distance from the Tayuman, takes 100 A over a 100 mm hard-drawn copper trolley wire having a resistance of 0.270 ohms per km. The rail and ground return has a resistance of 0.06 ohm per km. If the station voltage is 750 V, what is the voltage of the car?
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