Why does a low wattage bulb glow brighter than a high wattage bulb in series connection?

ANU SEKAR
ANU SEKAR
@anu-sekar-0vMhfV • Oct 27, 2024

If there are two bulbs connected in series to 230v supply, why low watts bulb glow brighter?

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  • Jeffrey Arulraj
    Jeffrey Arulraj

    @jeffrey-xA7lUP • Jun 12, 2013

    Low watt CFL bulb grows brighter than ordinary filament bulb cos they use different principle than that of filament lamps

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  • lal
    lal

    @lal-R60Xjx • Jun 12, 2013

    Well, let us consider two bulbs in series. A low wattage bulb has higher resistance than the high wattage bulb.

    When connected in series, the same current will be flowing through both bulbs. Let it be I.

    Power output = I X I X R

    R is higher for low wattage bulb. So It will glow brighter.

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  • Sindhu Chowdary
    Sindhu Chowdary

    @sindhu-chowdary-tDAv1D • Jun 14, 2013

    The higher-wattage lamp has a lower resistance than the lower-wattage lamp. So, when they are connected in series, the larger voltage drop (IR) will appear across the lower-wattage lamp. As power is proportional to the square of the voltage, it is the lower-wattage lamp that will be the brighter.

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