Introduction and Falling Balls

Introduction and Falling Balls

8. . . . . 8.1 8.2 8.3

8-1 : 1. ? 2. ? 3. ? : .

. / ? / ? . / ?

. . , . . . : . , , . . -- : /

-- . , . . : . , .

: . : 0 . 0 , . ( : 1.6x10x10-19C, -1 , +1 .) * , . --

/ , ( ) . . / . . . (Voltage)) : . .

( : / , J/C=V, ) : , : 1C 100J , 100V . : 1.5JJ 1.5J V . : 10000V . / :

, . . , . . 10000 V . ( -10000V) / .

/ : . , . k: Coulomb . .

4 . ? 8-2 : 1. ?

2. ? 3. , ? 4. ? : / , 1 mm . / mm . / .

/ . / ? : . : ? , .

, . ( , , ,

) . . . . . (spin-up, spin-down) , , , . , . . .

, , / , (bands) . . (bands gap) . / , . / : . , . , , . ,

. ( ) / : , . ( ) ( ) , , . , . / : . . ( ) , . . , .

1 ? (a) , . . ,

. . (b) ( ) . (c) , . (d) . (e) . (f) , . (g) . (h) . (i) .

8-3 / . , . ( : 320 Km/h)) : N ( ), S ( ) (magne)tic dipole))

: , , . , , . ( : N ( ) ) : , . : James Clerk Maxwell .

. / . (magnetic monopole .) (spin) N

S N S / : 1. . 2. . : .

. (Earnsh)aws Th)e)ore)m) (fe)e)dback)) / : , ( ) , . , .

/ , . / (Ele)ctromagne)tic Induction) : . ( ) , , . , . / : . ( )

/ . , . . . . , . ( ) : , , , . 4

. ? / , , . . / . . , ,

, . . / : . , . , . . ( 30k)m/h)r , 300Km/h)r .)

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