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An incandescent bulb has a thin filament of tungsten that is heated to high temperature...

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Physics

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An incandescent bulb has a thin filament of tungsten that is heated to high temperature by passing an elect current The hot filament emits black body radiation The filament is observed to break up at random locatio after a sufficiently long time of operation due to non uniform evaporation of tungsten from the filament If the bu is powered at constant voltage which of the following statement s is are true JEE Adv 2016 Paper A The temperature distribution over the filament is uniform B The resistance over small sections of the filament decreases with time C The filament emits more light at higher band of frequencies before it breaks up D The filament consumes less electrical power towards the end of the life of the bulb

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