7.10 the forward converter of fig. 7-5a has parameters vs 100 v, n1/n2 5, n1/n3 1, lm 333 h, r 2.5 , c 10 f, and d 0.25, and the switching frequency is 375 khz. (a) determine the output voltage and output voltage ripple. (b) sketch the currents ilx, i1, i2, i3, ilm, and is. determine the power returned to the source by the tertiary (third) transformer winding from the recovery storage energy in lm.

Steel balls 12 mm in diameter are annealed by heating to 1150 k and then slowly cooled to 400 k in an air att 325 k and h -20 w/m2 k. assume the properties of the steel to be k- 40 w/m k,p 7800 kg/m3, and cp 600 j/kg k. a. determine whether lumped system method can be used to analyze this problem and if so why" b. determine the time required for the cooling process. c. determine the total amount of heat lost from each ball to the ambient air