问题
填空题
定值电阻R1:R2=3:2,当它们串联接入电路中,其功率之比为______;当它们并联接入电路时,其功率之比为______.
答案
(1)对于纯电阻电路,在串联电路中,P=I2R,I1=I2,
则
P1 |
P2 |
| ||
|
R1 |
R2 |
3 |
2 |
(2)在并联电路中,P=
U2 |
R |
则
P1 |
P2 |
| ||||
|
R2 |
R1 |
2 |
3 |
故答案为:3:2;2:3.
定值电阻R1:R2=3:2,当它们串联接入电路中,其功率之比为______;当它们并联接入电路时,其功率之比为______.
(1)对于纯电阻电路,在串联电路中,P=I2R,I1=I2,
则
P1 |
P2 |
| ||
|
R1 |
R2 |
3 |
2 |
(2)在并联电路中,P=
U2 |
R |
则
P1 |
P2 |
| ||||
|
R2 |
R1 |
2 |
3 |
故答案为:3:2;2:3.