Q 12-03-042NEETJEE MainTop questionMedium
A $60$ W bulb and a $100$ W bulb, both rated for $220$ V, are connected in series to a $220$ V supply. Which bulb glows brighter?
Answer: (C) the $60$ W bulb
$R = \dfrac{V^2}{P}$, so the $60$ W bulb has the larger resistance. In series the current is the same, and $P = I^2R$ is larger for the larger resistance: the $60$ W bulb glows brighter.
Solution by Sreeraj P, M.Sc Physics