When is more power delivered to a light bulb

cbse
current-electricity

#1

When is more power delivered to a light bulb, just after it is turned on and the glow of the filament is increasing or after it has been ON for a few seconds and the glow is steady?


#2

As, the voltage is applied across the cold filament, when it is first turned on, the resistance of the filament is low, the current is high and a relatively large amount of power is delivered to the bulb.
As the filament warms, its resistance increases and the current decreases. As a result, power delivered to bulb decreases.