1 |
4 |
100 | ||
|
2 |
E |
R+r |
50
| ||
40+10 |
2 |
2 |
2 |
NBS |
△t(R+r) |
△B•S |
R+r |
0.5×0.2×0.1 |
40+10 |
2 |
2 |
π |
24 |
A.用电压表测该电压其示数为100V |
B.该交变电压的频率为60Hz |
C.将该电压加在100Ω的电阻两端,则该电阻消耗的电功率为100W |
D.t=1/480s时,该交流电压的瞬时值为50V |
A.110V | B.110
| C.220V | D.220
|
A.I有=3
| B.I有=3A,Im=3
| ||||||
C.I有=
| D.I有=3
|
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