Em | ||
|
20 | ||
|
. |
I |
△ϕ |
(R+r) |
BL1L2 |
△t(R+r) |
. |
I |
BL1L2 |
(R+r) |
400×0.04×0.05×0.25 |
10 |
A.该交变电流的有效值是5A |
B.该交变电流的峰值是5A |
C.该交变电流的周期是0.05s |
D.该交变电流的频率是0.10HZ |
A.电压最大值为220V,电流最大值约为3.2A |
B.电压最大值为311V,电流最大值约为4.5A |
C.电压有效值为220V,电流有效值约为4.5A |
D.电压有效值为311V,电流有效值约为3.2A |
2 |
3 |
T |
4 |
A. | B. | C. | D. |
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