微波炉具有加热速度快、热效率高、清洁卫生等特点.近几年逐渐走进大众生活.它比一般电炉加热食品时间要快4~10倍,同时可以节约电能30%~80%.我们可以利用家中的电能表,钟表等来实际测量微波炉的效率.题目.(2011年全国物理竞赛)微波炉是一种利用向食 Microwave oven with heating speed, high thermal efficiency, sanitation and other characteristics. In recent years, gradually into the public life. It is 4 to 10 times faster than the average electric heating of food, while saving electricity by 30% to 80% .We can use Home energy meter, clocks, etc. to actually measure the efficiency of microwave ovens. (2011 National Physics Competition) Microwave oven is a use of food