问题
单项选择题
变压器负载运行时,由于变压器内部的阻抗压降,()将随负载电流和负载功率因数的改变而改变。
A、一次电压
B、二次电压
C、阻抗电压
D、电流电压
答案
参考答案:B
变压器负载运行时,由于变压器内部的阻抗压降,()将随负载电流和负载功率因数的改变而改变。
A、一次电压
B、二次电压
C、阻抗电压
D、电流电压
参考答案:B
Mr. and Mrs. Brown have two children, Mike and Liz. The whole family are all busy, so they often leave notes for each other. Read these notes and answer following questions.
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