2 |
A.10V | B.20V | C.15V | D.5
|
20
| ||
|
U2 |
R |
202 |
R |
T |
2 |
102 |
R |
T |
2 |
10 |
A.电饭煲的电阻为44Ω,洗衣机电动机线圈的电阻为440Ω |
B.电饭煲消耗的电功率为1555W,洗衣机电动机消耗的电功率为155.5W |
C.1min内电饭煲消耗的电能为6.6×104J,洗衣机电动机消耗的电能为6.6×103J |
D.电饭煲发热功率是洗衣机电动机发热功率的10倍 |
A. | B. | C. | D. |
A.电压的有效值为220V,电流的有效值为0.5A |
B.电压的最大值为220V,电流的有效值为0.5A |
C.电压的有效值为220V,电流的最大值为0.SA |
D.电压的最大值为220V,电流的最大值为0.5A |
A.10V,0.02s | B.10V,50Hz | ||||
C.10
| D.10
|
1 |
π |
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