Universitatea tehnic a Moldovei

Ministerul Educaiei a Republicii MoldovaUniversitatea Tehnica a Moldovei

Catedra de Fizica

REFERAT

LUCRAREA DE LABORATOR Nr.11TEMA: Determinarea componentei orizontale a induciei cmpului magnetic al pmntului.. A efectuat: st. gr. C-101 Virlan G.

A verificat: Burdujan E. Chiinu 20111.Scopul lucrrii: studiul elementelor cmpului magnetic terestru i determinarea componentei orizontale a induciei cmpului magnetic al Pamntului cu ajutorul busolei de tangente.

2.Aparate i utilaje:busola de tangente, ampermatru, reostat, surs de curent continuu, ntreruptor, comutator, fire de conexiune.

3.Schema instalaiei:

R

BT

K

+

SA

unde BT este busola de tangente

R-reostat

A-ampermetru

K-comutator

SA-ntreruptor

-sursa de curent

4.Formula de calcul:

B=

unde B cmpul magnetic al curentului

B0 componenta orizontal a cmpului magnetic al Pmntului

0 constanta magnetic

R raza bobinei

N numrul de spire din bobina electromagnetului.

unghiul de divierie

I intensitatea ce parcurge prin sririle bobinei.5.Tabelul msurrilor i determinrilor:

I,mA

EMBED Equation.3

R,mmNtg

B,TB

E,%

110504547,59023001,091,9210-50,56*10-329%

2207074729023003,071,3610

0,71*10-352%

330758077,59023004,511,3910

0,95*10-368%

440828382,59023007,591,1010

0,86*10-378%

550837478,59023004,912,1310-50,92*10-392%

V.m.30-----4,231,4410-50,8*10-363,8%

6.Exemplul de calcul:

EMBED Equation.3

EMBED Equation.3

EMBED Equation.3

EMBED Equation.3

7.Calculul erorilor:

B= (

EMBED Equation.3 )B=()*

B= 0.00410 (T) E=

=0.002*100% =0.2% B= (

EMBED Equation.3 )B=()B02=1.0610 (T) E=

=0.78*100%=B03= (

EMBED Equation.3 )B03=()B03=6.2910 (T)E=

=4,529*100%=B04= (

EMBED Equation.3 )B04=()

B04=0,8610 (T)B03= (

EMBED Equation.3 )B03=()

B03=0,6310 (T)E2==52% E3==68% E4==92% E5==63.8%8.Rezultatul final:

B=(1,920,56) 10 (T)

B=(1,360,71) 10 (T)

B=(1,390,95) 10 (T)

B04=(1,100,86) 10 (T)

B05=(2,130,92) 10 (T)

9.Concluzii:Efectund aceast lucrare ne-am familiarizat cu metoda de calcul a componentei orizontale a induciei cmpului magnetic terestru:

B=

Analiznd rezultatele experimentale s-a obinut urmtorul rezultat:

B=(1,920,56) 10 (T)

B=(1,360,71) 10 (T)

B=(1,390,95) 10 (T)

B04=(1,100,86)10 (T)

B05=(2,130,92)10 (T)

E=29% E2=52% E3=68% E4=92% E5=63.8%

Reeind din analiza calculrii erorilor reiese c pentru a minimiza erorile e necesar de utilizat dispozitive mai precise la calculul unor valori ale mrimilor precum:I,... i de efectuat calcule matematice mai precise.A

_1131992234.unknown

_1192964879.unknown

_1192985531.unknown

_1335164514.unknown

_1335165086.unknown

_1335165127.unknown

_1335164567.unknown

_1192985678.unknown

_1192985773.unknown

_1192985818.unknown

_1192985619.unknown

_1192985056.unknown

_1192985146.unknown

_1192984969.unknown

_1192960757.unknown

_1192963790.unknown

_1192964844.unknown

_1192964863.unknown

_1192964823.unknown

_1192960851.unknown

_1192961001.unknown

_1131995212.unknown

_1131996786.unknown

_1131998557.unknown

_1131998721.unknown

_1131999190.unknown

_1131998656.unknown

_1131995226.unknown

_1131995753.unknown

_1131992575.unknown

_1131992700.unknown

_1131994977.unknown

_1131992504.unknown

_1131724812.unknown

_1131990978.unknown

_1131991058.unknown

_1131991239.unknown

_1131991313.unknown

_1131990993.unknown

_1131724911.unknown

_1131990007.unknown

_1131724868.unknown

_1131724753.unknown

_1131724789.unknown

_1131724799.unknown

_1131724118.unknown

_1131724141.unknown

_1131724059.unknown

_1131723867.unknown