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a bulb of 100W and anather bulb of 200W , rated supply
voltage 230v.when supply voltage is reduced to 100v,which
bulb will give more light? and why with calculation?
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Answer Posted / mohit goyal
if both are connected in series. so 100w lamp more bright because its resistance is high so voltage drop is high in case of series. current is same both lamp.
if both r connected in parallel. so 200w lamp more bright because in case of parallel. voltage across each lamp is same so 200w lamp more bright.
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