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.dsy:it. : Powered by vBulletin version 2.3.1 .dsy:it. > Didattica > Corsi A - F > Fisica generale > Esercizi Thread Rating: 1 votes, 5.00 average.
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darkshadow
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Elettromagnetismo???

 

e la parte di elettromagentismo??




ds

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by Ð@rk§h@ÐØw

03-06-2009 13:42
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Gun
.grande:maestro.

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sabato se non vado in barca :D

03-06-2009 15:06
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darkshadow
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qualcuno mi spiega come si fa l'es 81??

e poi nel 83 non è che per caso manca il valore della massa??


ds

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by Ð@rk§h@ÐØw

06-06-2009 16:34
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Biggy
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Originally posted by darkshadow
 
qualcuno mi spiega come si fa l'es 81??

e poi nel 83 non è che per caso manca il valore della massa??


ds

Nell'81 credo che basti applicare la formula del lavoro della molla:
L = -1/2*k*x^2

Per l'83 credo che la massa non serva perchè si semplifica, xò non mi torna il risultato, io lo farei in questo modo:
Fg = sin(a)*m*g
Fa = N*u
N = cos(a)*m*g;
Ftot = Fg - Fa = sin(a)*m*g - cos(a)*m*g*u
a = F/m = sin(a)*g - cos(a)*g*u
Vfin = sqrt(2ad)

E mi risulta Vfin = 80m/s.....

06-06-2009 18:15
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Gun
.grande:maestro.

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Eccoci, oggi in giornata avrete i tanto desiderati (ooooh..) esercizi di elettromagnetismo.

Poi dò un'occhiata ai vostri commenti.

Stay tuned :D

09-06-2009 08:41
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frankKkK
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Ma lo scagnozzo che scannerizzi gli esercizi sull'ultima parte del corso non è stato ancora trovato???? Io purtroppo non posso...hihihihi...
...se qualcuno dovesse avere qualche anteprima sul compitino (chissà chi?? eheh) riuscirebbe non dico a dirci quali e come sono gli esercizi o la teoria, ma almeno ad indirizzarci leggermente?? Se chiediamo troppo, pazienza, ci ammazzeremo di esercizi fino al 22...a nuove news...

10-06-2009 14:33
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Gun
.grande:maestro.

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Nessuno è venuto, se proprio qualcuno vuole, potrebbe venire la fanciulla in terza fila venerdì mattina vagamente bionda :D

Arrivano gli esercizi.

Aprite gli ombrelli (cit.)

10-06-2009 14:46
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Gun
.grande:maestro.

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O) ELETTROMAGNETISMO: F, E, V, U

Last edited by Gun on 10-06-2009 at 16:29

10-06-2009 14:48
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Gun
.grande:maestro.

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154) Date le cariche come in figura, sapendo che q1=-1uC, q2=2uC e q3=4uC, sapendo che il lato del triangolo equilatero è di 10cm, quanto vale la F di Culomb subita da q1?



[F1=4,8N; mostrare anche direzione e verso con l'angolo che forma con l'asse x]

10-06-2009 14:51
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.grande:maestro.

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155) Date le cariche come in figura, il lato del triangolo l=1m, sapendo che qA=qB=2uC e qC=qD=-4uC, quanto vale il campo Elettrico al centro del quadrato?
Indicare modulo, direzione e verso.


[E=152,73*10^-3 N/C]

10-06-2009 14:53
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.grande:maestro.

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156) Date le cariche come in figura, il triangolo isoscele ha base1 metro e lati obliqui 2m.
Trovare E e V nel punto centale della base sapendo che le tre cariche sono uguali e valgono -6,4*10^-16 C.


[V=-25,97uC; E=1,54uV/m]

10-06-2009 14:55
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.grande:maestro.

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157) Date le cariche come in figura (eccheppalle...), sapendo che l'esagono regolare ha lato di 20cm, si trovino E,V al centro con direzione e verso, dove necessario.
Le cariche valgono q1=10nC, q2=20nC, q3=30nC, q4=40nC, q5=50nC, q6=60nC.


[V=9450V; E=13500V/m]

10-06-2009 14:57
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.grande:maestro.

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158) due cariche q1=0,29nC e q2=-0,52nC si trovano alla distanza di 15cm. Se le sposto a 40 cm, trovare il rapporto tra la F di coulomb reciproca prima e dopo lo spostamento.



[7,11]

10-06-2009 15:00
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.grande:maestro.

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159) Date le cariche come in figura, sapendo che il lato del triangolo equilatero misura 12cm e le tre cariche sono uguali e valgono 4uC, trovare la F che agisce su ogni particella ed il campo E nel centro del triangolo.

10-06-2009 15:04
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.grande:maestro.

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160) Sulla superficie terrestre agisce un E=150V/m uniforme e diretto verso il centro della Terra. Due particelle identiche di massa=25g (!!!!!) cadono da un'altezza di 4m ed hanno carica pari a q1=-30uC e q2=20uC).
Dopo quanto tempo toccano il suolo? A che velocità toccano il terreno?

[t1=0,31s ; t2= 0,28s ; v1=2,98m/s ; v2 =2,78 m/s(approssimativ....) ]

10-06-2009 15:08
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