Six similar bulbs are connected as shown in the figure with a $DC$ source of $emf\; E$, and zero internal resistance. The ratio of power consumption by the bulbs when $(i)$ all are glowing and $(ii)$ in the situation when two from section $A$ and one from section $B$ are glowing, will be
NEET 2019, Diffcult
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$\mathrm{R}_{\mathrm{eq}_{1}}=2 \mathrm{R} / 3$
$\mathrm{R}_{\mathrm{eq}_{2}}=\mathrm{R} / 2+\mathrm{R}=\frac{3 \mathrm{R}}{2}$
$\mathrm{P}_{\mathrm{eq}_1}=\frac{\mathrm{E}^{2}}{2 \mathrm{R} / 3}=\frac{3 \mathrm{P}}{2}$
$\mathrm{P}_{\mathrm{eq}_1}=\frac{\mathrm{E}^{2}}{3 \mathrm{R} / 2}=\frac{2 \mathrm{P}}{3}$
$P_{eq_{1}}: P_{eq_{2}}=9: 4$
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