The single-phase half-bridge inverter has a resistive load of R=2.4 2 and the de input voltage is Vs =48V. Determine (a) the ms output voltage at the fundamental frequency Voi.(b) the output power (c) the average and peak currents of each transistor. (d) the peak reverse blocking voltage and current of each transistor, (e) the THD. (f) the HF and of the LOH

Thermal stresses are developed in a metal when its a) initial temperature is changed b) final temperature is changed c) density is changed d) thermal deformation is prevented e) expansion is prevented f) contraction is prevented

The higher the astm grain size number, the finer the gran is. a)-true b)-false

Awall of 0.5m thickness is to be constructed from a material which has average thermal conductivity of 1.4 w/mk. the wall is to be insulated with a material having an average thermal conductivity of 0.35 w/mk so that heat loss per square meter shall not exceed 1450 w. assume inner wall surface temperature of 1200°c and outer surface temperature of the insulation to be 15°c. calculate the thickness of insulation required.