4 |
9 |
4 |
25 |
5 |
3 |
| ||
PR |
(60V)2 |
60W |
U2 |
R |
U2 |
60Ω |
U |
R1+R |
U |
R1+60Ω |
U |
R1+60Ω |
4 |
9 |
U |
R2+R1+R |
U |
R2+90Ω |
U |
R2+90Ω |
4 |
25 |
R1R2 |
R1+R2 |
30Ω×60Ω |
30Ω+60Ω |
R并 |
R并+R |
20Ω |
60Ω+20Ω |
1 |
4 |
| ||
R2 |
(
| ||
60Ω |
5 |
3 |
A.6V、3.6W | B.5V、2.5W | C.6V、2.5W | D.5V、3.6W |
A.R两端的电压为6V |
B.通过电动机的电流为6A |
C.电阻R消耗的电功率为144W |
D.电动机消耗的电功率为6W |
A.大于4W | B.等于4W | C.小于4W | D.无法确定 |
© 2017-2019 超级试练试题库,All Rights Reserved.