Elektrotehnika (0)

1. . . , . 2. . . .
| q1 | × | q 2 | , F=k r2 Í ×ì 2 k = 9 × 10 9 . Êë 2 1 k= , 4 0 0 = 8,85 ×10 -12 Ô/ì
| q1 | × | q 2 | F= . 4 0 r 2 ( )
| q1 | × | q 2 | F= , 4 0 r 2 ( > 1 ).
, . 3. . , , :
F E = . q :
|q| E= . 4 0 r 2 4. . . -- (), , . . 5. . . . :
1 1 C= = N 1 i =1 Ci 1 C1 + 1 C2 + 1 C3 + + 1 Cn . 6. . . . , . N C = Ci = C1 + C2 + C3 + + Cn . i =1 7. . , . 8. .
E s a d q :
A = F ×s = qEs ×cos = qEd , d . .
9. .
10. .
R2 = R1 (1 + [t 2 - t1 ]) ( ). > 0 ( ), I = . R 12. , .
U I = . R + r0 13. .
U2 P =U ×I = I2 ×R = . R 14. . . , . , . . . N R=