A.RA和RB的电阻之比为1:2 |
B.串联时RA和RB两端的电压之比为1:1 |
C.并联时RA和RB消耗的电功率之比是1:2 |
D.串联时,相同时间内RA和RB产生的热量之比为1:2 |
RA |
RB |
IB |
IA |
0.6A |
0.3A |
2 |
1 |
UA |
UB |
IRA |
IRB |
RA |
RB |
2 |
1 |
QA |
QB |
I2RAt |
I2RBt |
RA |
RB |
2 |
1 |
PA |
PB |
| ||
|
RB |
RA |
1 |
2 |
A.20欧 | B.30欧 | C.0欧 | D.60欧 |
A.2.4V~6V | B.3.6V~6V | C.6V~3.6V | D.6V~2.4V |
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