电工学-解题( 共2小题)

2024-11-16 07:45:10
推荐回答(1个)
回答(1):

电流密度 = 单位面积通过的电流强度:p = I/S

1.
S = 120*10 = 1200 (mm^2)
I = 2000A
p = 2000/1200 = 1.67A/(mm^2)

2.
S = 2.5(mm^2)
I = 26A
p = 26/2.5 = 10.4A/(mm^2)