1. 1.
....
(Atoms) 3
2.
.......

2. 3.
.........
3.1
........ 2
.........
Philosopher Thales)
..
(Sir William Gilbert)
3.2
(Direct Current) 2
1) (Primary Cell)
......

3. ...
.......
.
........
(Dry Cell)
Primary Cell)
2) Secondary Cell)
.
Storage Battery)
3.3
........

4. 1)
.....
....
Armature)
.... 1. 2. 3.

5. 2)
..... .
Commutature)
9
3.4
........
(Photo Cell)

6. 3.5 .....
2
...
3.6 ........

7. 4.
......... 2
4.1
.............
4.2
2
1) (Direct Current)

8. Battery)
2) (Alternating Current)
3
2
.................... (Single Phase)
................
1

9. 1
.......... (Three Phase)
...................
3
120
...............
SinglePhase)
2 1
1

10. . .
.