UR2= U2– UC2=> UR= 72V => I = UR/R = 36/25A103 4 F

Câu 27. B

HD: U

R2

= U

2

– U

C2

=> U

R

= 72V => I = U

R

/R = 36/25A

10

3

4

F

.

1 =

Z

C

= U

C

/I = 200/3  => C =

2

2 

fZ

C