2 |
A.电流表示数为0.055A | ||
B.电压表示数约为7.8V | ||
C.二极管两端的最大电压为11
| ||
D.1min内电阻R上产生的热量为726J |
112 |
R |
1 |
2 |
| ||
R |
2 |
| ||
R |
7.82 |
10 |
7.8 |
10 |
0.78 |
20 |
A.24W | B.34W | C.36W | D.72W |
A.5A,250V,50kW | B.5A、10kV,50kW |
C.200A,250V,50kW | D.200A,10kV,2×103kW |
A. | B. | C. | D. |
A.1:2 2U | B.1:2 4 U | C.2:1 4 U | D.2:1 2 U |
2 |
A.通过电阻的电流是22A |
B.交流电的频率是100Hz |
C.与电阻并联的电压表的示数是100V |
D.变压器的输入功率是484W |
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