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 1) all are glowing and 2 ) in the situation when two from section A and one from section B are glowing will be : 

 

  • Option 1)

    4: 9 

  • Option 2)

    9 : 4 

  • Option 3)

    1 : 2 

  • Option 4)

    2 : 1 

Answers (1)

R_{eq } = 2 R/3 \\\\ P_1 = 3 E^2 /2 R

R_{eq } = 3R/2 \\\\ P_2 = 2 E^2 /3 R \\\\ P_/ P_2 = 9/4


Option 1)

4: 9 

Option 2)

9 : 4 

Option 3)

1 : 2 

Option 4)

2 : 1 

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