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Im=πI Im= √2I Ie= √2Im Im=√2/2I
S=Um·Im S=√2Um·Im S=½Um·Im S=½Um/Im
goes, comes gone, came will go, will come has gone, will come back
i＝ 0.637Im i＝ 0.707Im i＝Im/√3 i＝ 0.5Im
po＞ih＞im＞iv ih＞im＞iv＞po im＞iv＞po＞ih iv＞po＞ih＞im iv＞im＞ih＞po
goes; comes gone; came will go; will come has gone; will come back
had wandered; missed was wandering; missed is wandering, have missed had wandered, have missed
Im=√3I； Im=√2I； Im=0.707I； Im=1.57I
I=21/2Im I=21/2Im/2 I=2Im I=Im/2
Im=√ 2I； Im=√2I／ 2； Im=I； Im=√ 3I。
too much much too so much very much
po.＞ih.＞im.＞iv. ih.＞im.＞iv.＞po. im.＞po.＞iv.＞ih. im.＞po.＞ih.＞iv. iv.＞im.＞ih.＞po.
headmaster a headmaster the headmaster of headmaster
has much to do with the operation of the engine and its life have much to do with the operation of the engine and its life has much doing with the operation of the engine and its life have much doing with the operation of the engine and its life
交流电Im =1 . 41 4Id 单相半波整流电Im =π Id/2 单相全波整流电Im =π Id 三相全波整流电Im =π Id/3
Im = 2I Im = 2I/2 Im =I Im = 3I。
Im=√2I Im=√2I／2 Im=I Im=√3I
11Im1－3Im2＝ 5 11Im1＋3Im2＝5 11Im1＋3Im2＝－5 11Im1－3Im2＝－5
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