Y10 science electrostatic forces and coloumbs law

1. ELECTROSTATIC FORCES AND THE STRUCTURE OF THE ATOM

9. (B) after combing. Arbitrary numbers of protons (+) and electrons (-) on a comb and in hair (A) before combing

10. Combing transfers electrons from the hair to the comb by friction, resulting in a negative charge on the comb and a positive charge on the hair

13. Charging by induction. The comb has become charged by friction, acquiring an excess of electrons.

14. The paper (A) normally has a random distribution of (+) and (-) charges.

15. (B) When the charged comb is held close to the paper, there is a reorientation of charges because of the repulsion of the charges.

16. This leaves a net positive charge on the side close to the comb, and since unlike charges attract, the paper is attracted to the comb

17. Identify which objects are charged _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ + + + + + + + + + + + + + + + + + + + +

18. Which objects would be attracted to each other _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ + + + + + + + + + + + + + + + + + + +

20. A neutral atom has no net charge because the numbers of electrons and protons are equal. In the Atom

21. Removing an electron produces a net positive charge; the charged atom is called a positive ion. The addition of an electron produces a net negative charge and a negative ion.

22. Charging by Friction

25. Electric and Magnetic Fields

40. Structure of the atom nucleus proton neutron electrons