Thế nào là bộ biến đổi xoay chiều – một chiều (Bộ chỉnh lưu có điều khiển hoàn toàn)?. Vẽ sơ đồ nguyên lý và so sánh sơ đồ chỉnh lưu thyristor hình cầu một pha tải thuần trở với chỉnh lưu thyristor tia hai pha tải thuần trở?

The filament of an incandescent lamp has a temperature of 2000k. calculate the fraction of radiation emitted in the visible light band if the filament is approximated as blackbody

Acarnot refrigerator operates in a room in which the temperature is 21°c and of power when operating. if the food compartment of the refrigerator is consumes 3 kw to be maintained at 2°c, determine (a) the coefficient of performance of the cycle and (b) the rate of heat removal from the food compartment. refrigerator cycle that has a higher coefficient of performance than that of the discussed (e) is it possible to develop a carn ot refrigerator, operating between the same temperature limits? explain

Define thermoplastic polymers and thermosetting polymers in terms of their structures, and (ii) describe briefly a process suitable for the production of products from each type of polymer.