• # question_answer What is the ratio of heat generated in R and 2R  [DCE 2003] A)            2 : 1 B)            1 : 2 C)            4 : 1 D)            1 : 4

Both R and 2R in parallel ( V ? constant) So using $P=\frac{{{V}^{2}}}{R}$ Þ $\frac{{{P}_{1}}}{{{P}_{2}}}=\frac{{{R}_{2}}}{{{R}_{1}}}$ Þ $\frac{{{H}_{1}}}{{{H}_{2}}}=\frac{{{R}_{2}}}{{{R}_{1}}}=\frac{2}{1}$