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Resistors and Lights
How is that in an electrical circuit a light bulb and a resistor can behave in the same manner but have different resistance values?
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A resistor and a light bulb both have resistance and so both will impede the current. The exact resistance will depend upon what material each is made of, its thickness, its initial temperature and its ability to lose any heat generated. If the temperature is maintained at a constant value, then the resistance will remain constant. If the temperature rises, then so will the resistance.
The resistance of the light bulb will measure much lower when no current is flowing through it. When a light bulb is illuminated its resistance increases considerably. If the voltage measured across a resistor and a light bulb connected in series in a live circuit is the same they have the same operating resistance
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