1. (. .7). = 0 r. ³ .
2. = 0 = - (. 7). . , .
3. , < 80 /, '. ֳ (, , - ) (m max = 5000 - 50000 ) . , > 4000 /, ( ) [2, .230-231].
4. = f(t) , , , (. 9). , , - ( ). , . , = f(t) (. 9).
, - , .
, ( m; m) , .
.9
m m, - (. 9),
, (1)
m 0 = 4p× 10-7 /.
5. , - , [1, .190-191; 2, .227-229] V o (, ), .
. (2)
. .
6. , S .