Why do power companies use low currents in power lines whentransferring electric

Question

Why do power companies use low currents in power lines whentransferring electrical energy over large distances?

1 Because power lines have resistance andresistors transform electrical energy into thermal energy. Highcurrents would require larger power lines to reduce the amount ofheat loss and hence be much more expensive than the small powerlines that low currents require. Because power lines have resistance andresistors transform electrical energy into heat. The lower thecurrent the lower the resistance of the power lines and hence theless electrical energy is lost toheat.     Because power lines have resistance andresistors transform electrical energy into heat. The lower thecurrent, the less heat generated (and hence the less electricalenergy lost). Because power lines have resistance andresistors transform electrical energy into thermal energy.According to Ohm's Law, the lower the current the lower thevoltage. Thus both the voltage & current will be low and hencethe power loss will be small. 1 Because power lines have resistance andresistors transform electrical energy into thermal energy. Highcurrents would require larger power lines to reduce the amount ofheat loss and hence be much more expensive than the small powerlines that low currents require. Because power lines have resistance andresistors transform electrical energy into heat. The lower thecurrent the lower the resistance of the power lines and hence theless electrical energy is lost toheat.     Because power lines have resistance andresistors transform electrical energy into heat. The lower thecurrent, the less heat generated (and hence the less electricalenergy lost). Because power lines have resistance andresistors transform electrical energy into thermal energy.According to Ohm's Law, the lower the current the lower thevoltage. Thus both the voltage & current will be low and hencethe power loss will be small. 1 Because power lines have resistance andresistors transform electrical energy into thermal energy. Highcurrents would require larger power lines to reduce the amount ofheat loss and hence be much more expensive than the small powerlines that low currents require. Because power lines have resistance andresistors transform electrical energy into heat. The lower thecurrent the lower the resistance of the power lines and hence theless electrical energy is lost toheat.     Because power lines have resistance andresistors transform electrical energy into heat. The lower thecurrent, the less heat generated (and hence the less electricalenergy lost). Because power lines have resistance andresistors transform electrical energy into thermal energy.According to Ohm's Law, the lower the current the lower thevoltage. Thus both the voltage & current will be low and hencethe power loss will be small. 1

Explanation / Answer

1 Because power lines have resistance andresistors transform electrical energy into thermal energy. Highcurrents would require larger power lines to reduce the amount ofheat loss and hence be much more expensive than the small powerlines that low currents require. Because powerlines have resistance and resistors transform electrical energyinto heat. The lower the current the lower the resistance of thepower lines and hence the less electrical energy is lost toheat.     Because powerlines have resistance and resistors transform electrical energyinto heat. The lower the current, the less heat generated (andhence the less electrical energy lost). Because powerlines have resistance and resistors transform electrical energyinto thermal energy. According to Ohm's Law, the lower the currentthe lower the voltage. Thus both the voltage & current will below and hence the power loss will be small. 1 Because power lines have resistance andresistors transform electrical energy into thermal energy. Highcurrents would require larger power lines to reduce the amount ofheat loss and hence be much more expensive than the small powerlines that low currents require. Because powerlines have resistance and resistors transform electrical energyinto heat. The lower the current the lower the resistance of thepower lines and hence the less electrical energy is lost toheat.     Because powerlines have resistance and resistors transform electrical energyinto heat. The lower the current, the less heat generated (andhence the less electrical energy lost). Because powerlines have resistance and resistors transform electrical energyinto thermal energy. According to Ohm's Law, the lower the currentthe lower the voltage. Thus both the voltage & current will below and hence the power loss will be small. 1

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