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Gun
.grande:maestro.

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199)Una stufa di P=1250W è alimentata da V1=220V. Quanto vale i nella stufa? R nella spirale riscaldante? Quanta energia termica viene prodota in un'ora?

[I=5,7A; R=38,6ohm; E=4,5MJ]

Last edited by Gun on 11-06-2009 at 08:34
10-06-2009 17:02
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200) Dato il circuito in figura, con R1=100ohm, R2=300ohm, R3=40ohm, DeltaV=230V, trovare la Requiv nel sistema, la i in tutte le resistenze e deltaV ai capi di ogni resistenza.



[Requiv=115ohm; i1=1,5A; i2=0,5A; i3=2A; Vcb=80V; Vac=150V]
10-06-2009 17:09
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201) Dato il circuito in figura, con DeltaV=12V, R1=0,4Kohm; R2=0,5Kohm; R3=0,7Kohm, determinare Iequiv e Requiv.


[Requiv=690ohm; Itot=17mA]
10-06-2009 17:13
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202) Dato il circuito in figura, con R1=5ohm, R2=24ohm, R3=4ohm, R8=12ohm, trovare Requiv tra A e B.



[Req=6ohm]
10-06-2009 17:32
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*continuo stasera e domani mattina allego le figure*
10-06-2009 17:32
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203) Si veda la figura. C1=1uF, C2=3uF, Vab=400V, trovare Cequiv, Vac, Vcb.

Ci sono due metodi...


[Ceq=0,75uF; Vac=300V; Vcb=100V]
10-06-2009 21:25
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204) Si vea la figura. C1=3uF, C2=5uF, DeltaV=600V. Trovare Vac, Vcb e l'Energia immagazzinata nel sistema.



[Vac=375V, Vcb=225V; Etot=0,34J]
10-06-2009 21:28
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205) Si veda la figura. Le tre Capacità valgono C, quanto vale Ceq?



[Ceq=0,66C]
10-06-2009 21:29
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206) Due lampadine consumano 10W ciascuna se collegate, in serie, ad una pila da 20V.
Se colelgate in parallelo ad una pila di 5V, cosa si può dire sulle R delle lampadine? Quanta potenza dissipano nel 2 caso?


[R1=R2=10ohm; P=5W ciascuna]
10-06-2009 21:31
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207) Si veda la figura. R1=4ohm, R2=2ohm, R3=4ohm, I=3A. Trovare I2, I3, Vab.


[I2=2A; I3=1A; Vab=16V]
10-06-2009 21:33
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208) Si veda la figura. R1=R2=R6=4ohm, R3=8ohm, R4=R5=2ohm, DeltaV=24V, quando vale Requiv?

[Req=12ohm]
10-06-2009 21:34
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209) Si veda, come sempre, la figura. R1=4ohm, R2=8ohm, V=12V, Rintgen=3ohm. Trovare i,i1,i2.
10-06-2009 21:37
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210) 2 litri di acqua a 10°C vengono portati all'ebollizione (T=...) in 12min da un fornello (R=50ohm) alimentato con una deltaV continua.
Supponendo nulle le dispersioni di calore, quanto vale l'En termica del fornello? La Potenza? Corrente elettrica nella resistenza?


[E=7,535*10^5J; P=1046,5W; I=4,5A]
10-06-2009 21:40
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211) Trovare Itot sapendo che R1=4ohm, R2=8ohm, R3=4ohm; R4=5ohm; V=12V.
Si veda la figura.
10-06-2009 21:44
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212) Si veda la figura, C1=4uF, C2=6uF, C3=5uF, Vab=65V, trovare Q1, Q2, Q3.



[Q1=Q2=156uC; Q3=325uF]
10-06-2009 21:46
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