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# Q. Name the physical quantity which is (I) same (ii) different ,in all the bulb when three bulbs of : (A) same wattage are connected in series (B) same wattage are connected in parallel (C) different wattage are connected in series (D) different wattage are connected in parallel

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Solution

## Well... In the question nothing is specified about voltage ratings of bulb are same or different.I assume it as they are same . So the answer would be : a)Physical quantity which remains same when some wattage are connected in series : --->Same wattage , so same voltage then same resistance --> Same voltage drop means same voltage drop across the bulbs.hence current, potential drop, resistance and luminosity of bulb remains same Different ---none b)Same wattage are connected in parallel:Answer would be : same potential drop, current and resistance.Different --none c) Different wattage are connected in series: If wattage is different with same voltage rating then resistance will be different then potential drop also differs.Only electric current remains same. d)Different wattage are connected in parallel: If wattage is different with same voltage then the resistance are different too . Current also differs .Luminosity also differs.  Suggest Corrections  7      Similar questions
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