重庆外卖:一道物理题
来源:百度文库 编辑:高考问答 时间:2024/05/15 10:22:27
已知电流为2A±0.2 电压为15V±0.5
而且电阻为7.5欧
问电阻的uncertainty(不确定度)为多少?
而且电阻为7.5欧
问电阻的uncertainty(不确定度)为多少?
(15+0.5)/(2-0.2)=8.61
(15-0.5)/(2+0.2)=6.59
8.61-6.59=2.02
2.02/7.5=26.93%
完毕
几年级的?
(15+0.5)/(2-0.2)=8.61
(15-0.5)/(2+0.2)=6.59
(15+0.5)/(2-0.2)=8.61
(15-0.5)/(2+0.2)=6.59
8.61-6.59=2.02
2.02/7.5=26.93%