在忽略变压器内部损耗的情况下,变压器的一、二次电流之比与()之比成反比
A. 一、二次侧感应电动势瞬时值:
B. 一、二次侧感应电动势最大值
C. 一、二次侧电压瞬时值
D. 一、二次绕组匝数
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如果忽略变压器一、二次绕组的()和电阻时,变压器一次侧电压有效值等于一次侧感应电动势有效值,二次侧电压有效值等于二次侧感应电动势有效值
A. 漏电抗
B. 励磁电抗
C. 励磁阻抗
Participating schools will receive full credit for researching and reporting on their
A. species
B. type
C. category
D. sort
She commanded that the troops ________ the water.
A. to cross
B. crossed
C. to be crossed
D. cross
The ________ she felt over the death of her husband was almost too much to bear.
A. amazement
B. optimism
C. sorrow
D. confidence