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

Question

Infinity Learn · Accepted Answer

Power consumed, $$P=i2R$$          $$Peq1=(i/3)2$$×$$3R+(i/3)2$$×$$3R=23i2R$$         ......(i) (ii)     $$Peq2=(i/2)2$$×$$R+(i/2)2R+i2R$$                       $$=32i2R$$                    .........(ii) Divide equation (i) by (ii),   we get $$Peq1Peq2=23i2R32i2R=49$$

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

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