What do you usually do at the weekend? Some people like to 1 at home. But others like to go 2 a walk or play football. My friend Jack works hard in a factory on weekdays. At the weekend, he always 3 the same thing. On Saturday he 4 his car and on 5 he goes with his family to a village by car. His uncle and aunt have a farm there. It isn't a 6 one, but there's always 7 work to do on a farm. In 8, the harvest season, the children help them pick oranges. They also help with the animals and give them their 9. Jack and his wife help in the fields. At the end of the day, they are all 10 and Jack's aunt gives them a big meal.

某班同学在化学实验室上复习课，主题是常见气体的制备，实验室准备了部分药品并提供以下装置，请分析同学们的操作后回答下面问题：

 一只灯泡和一个电阻并联后接在电压为U的电路中，已知电阻的阻值为R，干路上的总电流为I，则灯泡消耗的电功率为____ ，灯泡的电阻是　____ 　．（用题目中所给的物理量表示）