There are two electric bulbs of 40W and 100W. Which one will be brighter when first connected in series and then in parallel ???
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• As P1/P2 = P2/P1 = 100/40 = 5/2
Resistance of 40W bulb is 5/2times than 100W
In series, P = i²R and in parallel, P = V²/R
Thus, 40W is series and 100W in parallel will grow brighter.
Resistance of 40W bulb is 5/2times than 100W
In series, P = i²R and in parallel, P = V²/R
Thus, 40W is series and 100W in parallel will grow brighter.
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