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  • The three resistances of equal value are arranged in the different combinations shown below. Arrange them in increasing order of power dissipation <img alt="" src="https://cdn.entrance360

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

Option: 1

III < II < IV <I

 


Option: 2

II < III < IV < I

 


Option: 3

I < IV < III < II

 


Option: 4

I < III < II < IV


Answers (1)

best_answer

\mathrm{ P=i^2 R}

Current is same, so \mathrm{P \propto R}
In the first case I is 3 r, in second case it is \mathrm{\frac{2}{3} r}, in third case it is \mathrm{\frac{r}{3}} and in fourth case the net resistance is \mathrm{\frac{3 r}{2}}.

\begin{aligned} & \mathrm{R_{I I I}<R_{I I}<R_{I V}<R_I }\\ &\mathrm{ \therefore P_{I I I}<P_{I I}<P_{I V}<P_I } \end{aligned}

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SANGALDEEP SINGH

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