An iron rod is subjected to cycles of magnetization at the rate of 50 Hz. Given density of rod is $8\times {10}^3\mathrm{kg}/{\mathrm{m}}^3$ and specific heat $0.11\times {10}^{-3}\mathrm{cal}/{\mathrm{kg}}^{\circ }\mathrm{C}.$ If area enclosed by the B-H loop corresponds to energy of ${10}^{-2}\mathrm{J}$ then rise in temperature per minute is nearly is (Assume there is no radiation losses)