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Question

Three resistances of equal value are connected in four different combinations as shown in figure. Arrange them in increasing order of power dissipation 



Your Answer
A
III < II < IV < I    
Correct Answer
B
II < III < IV < I    
Your Answer
C
I < IV < III < II
Your Answer
D
I < III < II < IV

Solution

The correct option is D II < III < IV < I    

Let R be the value of each resistance. The resistances of combinations I, II, III and IV are  3R, 2R3, R3 and 3R2 respectively. Now power dissipation is inversely proportional to resistance

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