191问答库 > 理想变压器初级和次级线圈的匝数分别为n1=10匝和n2=100匝，次级线圈接有1000Ω的电阻，初级线圈与电阻不

理想变压器初级和次级线圈的匝数分别为n1=10匝和n2=100匝，次级线圈接有1000Ω的电阻，初级线圈与电阻不

2025-03-15 11:51:09
推荐回答（1个）
回答1：

由法拉第电磁感应定律，则有：e=N
△?
△t
＝
△B
△t
?S=B0Sωcosωt；
所以感应电动势的最大值为，有：Em=B0Sω=0.5×
0.4
π
×
2π
0.02
V=20V；
则有，有效值为：E=
Em
2
＝10
 2
V；
根据原副线圈电压与匝数成正比，则有：U副=
n2
n1
U 原＝
100
10
×10
 2
V＝100
 2
V；
由欧姆定律，可知，副线圈的电流大小为：I副=
U副
R
＝
100

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