A three-way 240 V lamp bulb that contains two filaments is rated for 150-300-450 W. One filament burns out. Afterward, the bulb operates at the same intensity (dissipates energy at the same rate) on its lowest as on its highest switch positions but does not operate at all on the middle position. What are the (a) larger and (b) smaller values of the filament resistances?
A three-way 240 V lamp bulb that contains two filaments is rated for 150-300-450 W. One filament burns out. Afterward, the bulb operates at the same intensity (dissipates energy at the same rate) on its lowest as on its highest switch positions but does not operate at all on the middle position. What are the (a) larger and (b) smaller values of the filament resistances?
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Transcribed Image Text:A three-way 240 V lamp bulb that contains two filaments is rated for 150-300-450 W. One filament
burns out. Afterward, the bulb operates at the same intensity (dissipates energy at the same rate) on
its lowest as on its highest switch positions but does not operate at all on the middle position. What
are the (a) larger and (b) smaller values of the filament resistances?
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