Two bulbs 60W, 220V and 40W, 220V are connected in series. Which of the bulb glow brighter and why?
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Answered by
23
Always, when two bulbs of the same voltage and different wattages are connected in series, the lower wattage bulb will glow brighter. ... There is no question that the 40w bulb has a higher resistance than the 60w bulb; so the 40w bulb will dissipate more wattage and therefore be brighter.
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Answered by
26
Explanation:
the 40w bulb has a higher resistance than the 60W (where W=VxV/R)
the bulbs in series have the same current flowing through both of them.
brightnes = Power = IxIxR (where I=current)
Therefore the bulb with the higher resistance and with the same current will have the higher power and hence higher brightness.
Therefore the 40W will be brighter than the 60W
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