The three resistances of equal value are arranged in the different combinations shown below. Arrange them in increasing order of power dissipation

Options

A. `IIltIltIII`
B. `IgtIIIgtII`
C. `IltIIIltII`
D. `IltIIltIII`

Answer

A

Explanation

`P=i^(2)R` Current is same `P=R`
In the first case it is `3r` in second case it is `(2)/(3)r` in third case it is `(r)/(3)` and in fourth case the net resistance is
`(3r)/(2)`
`R_(III)ltR_(II)ltR_(IV)ltR_(I)becauseP_(III)ltP_(II)ltP_(IV)ltP_(I)`