P.1

1. P.1

2. P.1 Electric charges Rubbing

3. P.1 Atom + - Proton Electron Neutron Matter

4. P.1 Hydrogen + - Electrically neutral

5. P.1 - - - - + + + + + + - + + - - -

6. P.1 No. of electrons = no. of protons Electrically neutral Only electron can be added or removed

7. P.1 - - - + + + + + + - + + - - Positive charge - -

8. P.1 - - - - + + + + + + - + + - - - Negative charge -

9. P.1

10. P.1

11. P.1 + + - - Like charges repel

12. P.1 + - Unlike charges attract

13. P.1 + - Charged object attracts uncharged object

14. P.1 Test + + + + + - - - - -

15. P.2 Kinetic energy of electrons Rubbing

16. P.2 Positive charges are formed because of loss of electron - Negative charges are formed because of gain of electron Principle of conservation of charge

17. P.2 Coulomb (C) Unit of charge Charge of an electron = - 1.6x10-19 C No. of electrons in 1 C = 6.25 x 1018 Smallest charge = - 1.6x10-19 C

18. P.2 Free electrons Conduct electricity & heat energy Conductor Insulator

19. P.3 Charge distribution Resultant force = 0 Charges repel each other Charges are rest on the surface

20. P.3 Charge distribution Higher charges density at sharp edge

21. P.3 Kinetic energy of electrons Positive charges are formed because of loss of electron - Negative charges are formed because of gain of electron Rubbing

22. P.3 Resistor -

23. P.3 5 kV

24. P.3 EHT e-

25. P.3 EHT e-

26. P.5 Positive & negative charges are formed Charge sharing - - - - Sphere is neutral Electrons are repelled

27. P.5 e- - - - - Electrons are repelled & flow to the sphere

28. P.5 - - Negative charges are shared between the rod & the sphere

29. P.5 - - Charge sharing produces same kind of charge Amount of charge decreases after sharing

30. P.5 Positive & negative charges are formed + + + + Sphere is neutral Electrons are attracted

31. P.5 e- + + + + Electrons are attracted & flow to the rod

32. P.5 + + Positive charges are shared between the rod & the sphere

33. P.5 + + Charge sharing produces same kind of charge Amount of charge decreases after sharing

34. P.5 (e.g.) +9 x 10-10 C -4 x 10-10 C Charges are attracted each other

35. P.5 (e.g.) Total charges = +5x10-10 C Positive Charges are repelled

36. P.5 (e.g.) Charges in each ball = +2.5x10-10 C

37. P.4 Positive & negative charges are formed Charge induction - - - - Sphere is neutral Electrons are repelled

38. P.4 e- e- Earthing - - - - Positive charges are attracted by the negative charges of the rod Negative charges are shared between the sphere & the earth

39. P.4 Bigger in size will have more charges Nearly all charges in ball will be gone Charges are shared by the ball & the Earth Earthing

40. P.4 - - - - The surface area of the earth is much larger Nearly all the negative charges are lost

41. P.4 Charge induction produces opposite sign of charge Amount of charge remains the same

42. P.4 Positive & negative charges are formed + + + + Sphere is neutral Electrons are attracted

43. P.4 e- e- Earthing + + + + Negative charges are attracted by the positive charges of the rod Positive chargesare shared between the sphere & the earth

44. P.4 + + + + The surface area of the earth is much larger Nearly all the positive chargesare lost

45. P.4 Charge induction produces opposite sign of charge Amount of charge remains the same

46. P.4 Positive & negative charges are formed No charge - - - - Electrons are repelled

47. P.4 - - - - The spheres must be separated under the presence of the charged rod

48. P.4 Both kinds of charges are produced

49. P.4

50. P.4