فیزتک

Chapter 5

5.1

Questions Chapter 5 _ Longman Physics 11-14

1) What is an atom

2) Name particles in an atom and their charge.

3) Why an atom is electrically neutral?

4) Which particle ofa atom can be moved? Why?

5) How can have a plastic ruler with positive charge?

6) How can have a plastic ruler with negative charge?

7) What is static electricity?
Static electricity is the result of an imbalance between negative and positive charges in an object. These charges can build up on the surface of an object until they find a way to be released or discharged.
8) What is a conductor?

9) In a conductor how can prevent the charge flows away?
By insulating

10) What call substances that can be charge with static electricity?

11) Which one can have positive or negative static charge?
Acetate        positive
Polythene    negative

12) Explain an experiment that show repulsion in static electricity.

13) Explain an experiment that show attraction in static electricity.

 14) Same charge (or ‘like’ charge) _________ and opposite charge _________.

15) Small particles are attracted to objects charged with static electricity. Give an example?

16) Introduce induced charge by an example?

17) By which machine we can make static electricity?

18) How a Van de Graaff generator can have positive charge?

19) How clouds become charge up?

20) How a lightning occurs between cloud and the ground?

5) How can have a plastic ruler with positive charge?

6) How can have a plastic ruler with negative charge?

7) What is static electricity?

Static electricity is the result of an imbalance between negative and positive charges in an object. These charges can build up on the surface of an object until they find a way to be released or discharged.

8) What is a conductor?

9) In a conductor how can prevent the charge flows away?

By insulating

10) What call substances that can be charge with static electricity?

11) Which one can have positive or negative static charge?

Acetate           positive

Polythene       negative

12) Explain an experiment that show repulsion in static electricity.

13) Explain an experiment that show attraction in static electricity.

 14) Same charge (or ‘like’ charge) _________ and opposite charge _________.

15) Small particles are attracted to objects charged with static electricity. Give an example?

16) Introduce induced charge by an example?

17) By which machine we can make static electricity?

18) How a Van de Graaff generator can have positive charge?

19) How clouds become charge up?

20) How a lightning occurs between cloud and the ground?