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Resistances ${R_1}$ and ${R_2}$ are joined in parallel and a current is passed so that the amount of heat liberated is ${H_1}$ and ${H_2}$ respectively. The ratio $\frac{{{H_1}}}{{{H_2}}}$ has the value
  • A$\frac{{{R_2}}}{{{R_1}}}$
  • B$\frac{{{R_1}}}{{{R_2}}}$
  • C$\frac{{R_1^2}}{{R_2^2}}$
  • D$\frac{{R_2^2}}{{R_1^2}}$
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