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Six similar bulbs are connected as shown...

Six similar bulbs are connected as shown in the figure with a DC source of emf E, and zero intermal 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:

A

`2:1`

B

`4:9`

C

`9:4`

D

`1:2`

Text Solution

Verified by Experts

The correct Answer is:
C

`(P_(eq))=(i//3)^(2)xx3R+(i//3)^(2)xx3R=(2)/(3)i^(2)R`

(ii) `P_(eq)2=(i//2)^(2)xxR+(i//2)^(2)+i^(2)R=(2)/(3)i^(2)R`
`(P_(eq_(1)))/(P_(eq_(2)))=(2//3i^(2)R)/(3//2i^(2)R)=(4)/(9)`
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