Question

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

• A. $III<II<IV<I$
• B. $II<III<IV<I$
• C. $I<IV<III<II$
• D. $I<III<II<IV$

Answer 1

The correct option is B $II<III<IV<I$

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