Ejercicos resueltos de circuitos rc
[pic]
[pic]
[pic]
[pic]
I (t=10s) = 4, 06 [pic]A
I (t=10s) =4, 06 [pic]A
t=RC
t=??=RC
a)
q (t) =ℇ. C (1-[pic])
q (t=??) = (6v) (1, 5 * [pic]
q (t=??) =5.69 [pic]c
q (t=??) =5.69µc
b)
[pic]
[pic]
I (t=??) =[pic]
I (t=??) =1.1[pic]A
I (t=??) =1.1µA
c)
P=Iℇ
P= (1.1[pic]A)(6v)
P=6.6[pic]Watts
P=6.6µW
d)
P=I (IR) =[pic]
P=[pic]
P=2.4[pic]Watts
P=2.4 µW
e)
U=[pic] [pic]
[pic]U = [pic] ([pic] [pic]
U(t) = [pic]
I (t)
U (t)=[pic].I (t)
U (t=??)= [pic]* 1.1[pic]A
U (t=??)=4.17 [pic]Watts
U (t=??) =4.17µW
[pic]
[pic]
a)C=[pic] Q=C.V
Q= 6 [pic].100v
Q=600 [pic]
Q=600µc
b) V=I.R
I= [pic]
I=0.2A
c) ??=RC=(500Ω)(6 [pic]??=3000 [pic]
??=3 [pic]
??=3ms
d)
q (t)= Q [pic]
q (t=6 [pic] 600 [pic])[pic]
q (t=6 [pic]
q (t=6 [pic]
e) U=[pic]
U=[pic] (6 [pic]) ([pic]
U=3 [pic]
U=30 [pic]
U=30 mJ
f) U=[pic]
U (t)=[pic]
V (t)=RI (t)
V (t)=R. ( [pic]
V (t)=V.[pic]U (t)= [pic] C [V.[pic] [pic]
U (t)= [pic] C [pic] [pic]
U (t)= [pic]. [pic]
[pic]
a)
q (t) =ℇ. C (1- [pic] )
q (t=0) =5v. 1.6*[pic]*1q (t=0)=8*[pic]
q (t=0)=8μc
b)
q (99%)= [pic]=7.92*1[pic] 7.92μc
q ([pic] = ℇ. C. (1-[pic]
7.92*1[pic] = 8*[pic] (1-[pic][pic]= (1 - [pic]
0.99= (1 - [pic]
[pic]
[pic]
[pic]
t=Ln 0.01.[pic]
t=73, 68 *[pic]...
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