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if 100W and 200W bulbs are connected in series to a supply
which bulb will glow brighter and why
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Answer Posted / neeraj
100W bulb will glow brighter.
Suppose they are first connected individually (to find their
resistance), we will find that resistance R=V^2/P will be
higher for 100W bulb.
Now, when two bulbs are connected in series, current through
each of them is same so the thermal energy produced per
second i.e. I^2.R will be higher for 100W bulb which
accounts for its high brightness.
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