单选题理想变压器原、副边绕组匝数N1和N2各增加18%,所加电压大小及频率保持不变,则变压器的铁芯中主磁通会()。A增加18%B减少18%C增加9%D减少15%
单选题
理想变压器原、副边绕组匝数N1和N2各增加18%,所加电压大小及频率保持不变,则变压器的铁芯中主磁通会()。
A
增加18%
B
减少18%
C
增加9%
D
减少15%
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