The document discusses the history and discovery of electricity. It notes that the Greek philosopher Thales of Miletus first observed the property of electricity in amber around 600 BC and that electricity derives its name from the Greek word for amber. It also mentions that many materials like glass, plastic, fur and silk can be electrified by rubbing and exhibit the properties of attracting or repelling light objects.

2. વિદ્યુત
Part 1
7/25/2023
]|2ushin $ir
2

3. Obtain Gauss’s Law from Coulomb’s Law
7/25/2023
]|2ushin $ir
3

4. Obtain Coulomb’s Law from Gauss’s Law
7/25/2023
]|2ushin $ir
4

5. E by Spherical Shell (r<R)
7/25/2023
]|2ushin $ir
5

6. E by Spherical Shell (r>R)
7/25/2023
]|2ushin $ir
6

7. E by Spherical Shell (r>R)
7/25/2023
]|2ushin $ir
7

8.  The credit of discovery of the fact that Amber (Mineral) rubbed with wool or
silk cloth attracts the light objects goes to the Thales of Miletus of Greece
around 600 BC.
 The name Electricity is coined from the Greek word electron meaning Amber.
 Many such pairs of materials were known which on rubbing could attract light
objects like straw, pith balls and bits of papers.
 Activity: After Ironing the thin strips of white paper, it we Take them near a
TV or mobile screen, strips get attracted & remain stuck to the screen for a
History
7/25/2023
]|2ushin $ir
8

9. Types of Charge
7/25/2023
]|2ushin $ir
9

10. Types of Charge
7/25/2023
]|2ushin $ir
10

11. 7/25/2023
]|2ushin $ir
11
Repulsion Repulsion
Attraction
Repulsion Repulsion Attraction
Plastic
Touch
Glass
Touch
Plastic
Touch
Rubbed
with
Fur
Glass
Touch
Rubbed
with
Silk
2 Glass road Rubbed with
Wool or Silk clothe comes Closer
2 Plastic Rods Rubbed with
Fur (cat skin) comes Closer
But 1 Glass Rod & 1 Plastic Road
come Closer

12. 7/25/2023
]|2ushin $ir
12

13. 7/25/2023
]|2ushin $ir
13

14. 7/25/2023
]|2ushin $ir
14

15. 7/25/2023
]|2ushin $ir
15

16. 7/25/2023
]|2ushin $ir
16

17. 7/25/2023
]|2ushin $ir
17
Aakar
 વિદ્યુત સામેનુું દૃશ્ય ખરેખર અદ્ભુત
Baloo Bhai
 વિદ્યુત સામેનુું દૃશ્ય ખરેખર અદ્ભુત
Lohit Gujarati
 વિદ્યુત સામેનુું દૃશ્ય ખરેખર અદ્ભુત
Mogra
 વિદ્યુત સામેનુું દૃશ્ય ખરેખર અદ્ભુત
Mukta Vaani
 વિદ્યુત સામેનુું દૃશ્ય ખરેખર અદ્ભુત
Padmaa
 વિદ્યુત સામેનુું દૃશ્ય ખરેખર અદ્ભુત
Rasa
 વિદ્યુત સામેનુું દૃશ્ય ખરેખર અદ્ભુત
Rekha
 વિદ્યુત સામેનુું દૃશ્ય ખરેખર અદ્ભુત
Samyak Gujarati
 વિદ્યુત સામેનુું દૃશ્ય ખરેખર અદ્ભુત
Shruti
 વિદ્યુત સામેનુું દૃશ્ય ખરેખર અદ્ભુત