___

R1=R2=f,3qE=artatsgda

i;l1l;lj.lra bomete srupdrii de rezistori rdmdne

1 i;"lli?iliti,!"a curenturui prin rezisorur R, rimane

ff; *o'.. instrumentere etectrice este adevSrat

n'/

i.

rg;,."ffi.5gigffi,gti+:*tt:x"; 88. Un obiect lun

distanta d de un 1'1-1-* inillime Y, se afti tao"pr"""".#rlrr,""ttn fix' intre obilct gi ecran sen i"u r.-i"-"1fflli::-"vergenti cu distanta

ffi:l,.x j*;-#,;H;,;ff.",fl ,,Tff :"ff;

Ffr ?

1.d>4f2.d<4f3-

-tt = Jh"?,

17,=

3: ll".Xn: ilr3. il ;"J t'"'.T i,,:,:3. se carcure# ;;'ffii""r:: n, = t ",4r---'-

f"ffi tt f.: #ff :1. i".",",o "."" l"*j;te n re i

##_f# ::?fe,lten sitili i r a c u re ntu I u i etectric

ifJ:fl"Flq$i:riLqi,i;ff,J?,?3r.*.;.T'i.' j*t,","I

4. puterea consumati de rezistor se dubleazd

E!H"*IH"",f ""1,f:ffi..*Ttr-orentiriI H."?^.:J:a r- i ma gi n i d repte

:1:'j,f:11.;;J#',11u::4. are distai-SiF

l.?ffi mTItfi.5'di,t- coi n cide cu roca ru,

t :IE :'', Jiif :, i'i}i: E::il";,i i m a re dec6 t d ista n ra

1';g1H?r,?T',: :,'^.:T:ysi:i plterii de ra oIX,::1: (E' r) ti il;;ilH::i,fH:l: j.t g*j:T !s, :,=. :.;d;" #J

B

i;'f;'rlll,Effi ffi ,.rl *" rezistorur R. devin e esa rd

4. intensita* *..n*ll'i Prin R, r

rlui prin R, scade

iffi1$il{il*pihff ,,"r}iy!i:i",r.,fl ;:j:J:,

i:i$fiffiilfr L'i,:1"T.&i:f$E,rf,Sl?,ii,,J,,,,p

ij,#[T=f:f if.l intre cirdu ra moh"d ta/

I$llnffi""kTffi,,:lf,,r.co+cy=R rrrrEUoc

2.y = c^,1cS. R =.rri4.Co=Cv+R

fifliii*:r*i'fufl f.#I.i11:*i***'

A-t'

r+a"

L?conectate la

2. R.l2

3. (E-R.t).t

\,/

#"i:,H if,fil1t' ill;i'*,:'"3r,:if u, R, c u

z.n=6 b ,/3.q=50% ,,/4-q-Tggoyo '/93. ta dispozitivul

i*',-,THff,ffrJ'i,nflffiffit, ilH{ A

HffrPnncipiut at [_tea at termodtnamicii

itt-#,:t nu poate trece de ra un corp mai rece ra unur

3g;f pjj"',:'rl?igr"lgflic cardura primita deffi ,:, i";dd=#i:?Ilmi,.. :i|[;;:,ililt?,0" Zmecmic

IHH#.i'.i;#i:'31 jxlrgililts,.ndseconserv.&T:lf;H"TJgg?1;i"x;iiii j?:",1,H*"i3?'.",{xil,"c- \/ cit s suo+; ft i' ffi:i,,ff ii"l?::i}: