An introduction to electrostatic forces of attraction and repulsion.

1. Electrostatics
Forces

3. +- +
+- +
+- +
+- +
+- +
+- +
Positive
+- +
Positive
+- +

4. repel
+- +
Positive
+- +
+- +
Positive
+- +

5. - +- + - +- + -
- +- +-
Negative
- +- + -
- +- + - +- + -
- +- +-
Negative
- +- + -

6. repel
- +- +-
Negative
- +- + -
- +- +-
Negative
- +- + -

7. Like charges repel
- +- +-
- +- +-
Negative
Negative
+- +
+- +
- +- + -
Positive
+- +
- +- + -
Positive
+- +

8. Like charges repel
- +- +-
Negative
- +- +-
repel
- +- + +- +
Positive
+- +
Negative
- +- + -
repel
+- +
Positive
+- +

9. +- +
+- +
- +- + - +- + -
+- +
- +- +-
Positive
+- +
Negative
- +- + -

10. attract
+- +
Positive
+- +
- +- +-
Negative
- +- + -

11. Opposite charges attract
+- +
Positive
+- +
- +- +-
Negative
- +- + -

12. Opposite charges attract
+- +
Positive
+- +
attract
- +- +-
Negative
- +- + -

13. +- +
Positive
+- +
- +- +-
- +- +-
Negative
- +- + - +- +-
Negative
Negative
+- +
+- +
- +- + -
Positive
+- +
- +- + -
Positive
+- +

14. +- +
- +- +-
Positive
+- +
Negative
attract
- +- +-
- +- +-
Negative
Negative
- +- + -
attract
+- +
- +- + +- +
Positive
+- +
- +- + -
Positive
attract
+- +

15. +- +
Positive
repel
- +- +-
Negative
+- +
attract
- +- + -
- +- +-
repel
- +- +-
- +- + -
attract
Negative
+- +
Positive
+- +
repel
attract
Negative
- +- + +- +
Positive
+- +

16. +- +
Positive
repel
- +- +-
Negative
+- +
attract
- +- + -
- +- +-
repel
- +- +-
- +- + -
attract
Negative
+- +
Positive
+- +
repel
attract
Negative
- +- + +- +
Positive
+- +

17. +- +
Positive
repel
attract
- +- +-
Negative
+- +
attract
- +- + -
- +- +-
repel
- +- +-
Negative
- +- + +- +
Positive
+- +
repel
attract
repel
repel
attract
Negative
- +- + +- +
Positive
+- +

18. +- +
Positive
attract
+- +
- +- +-
repel
+- +
+- +
Negative
- +- + -
- +- + -
Positive
Negative
- +- + -
- +- +-
Negative
- +- +-
+- +
repel
Positive
+- +

20. Electroscope

21. glass bottle

22. metal cap
metal shaft
gold leaves