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of 48 available terms

### 48 Multiple choice questions

1. Like charges
2. Electric forces can be either
3. is used to detect the presence of an electric field
4. SI unit for charge is the
5. normally insulators, but adding specific atoms as impurities can turn them into conductors (silicon, germanium - used a lot in electronics)
6. materials that do not allow charge to flow through them (glass, plastic, rubber, silk)
7. variable for charge
8. Charges reside only on
9. is the small, positive test charge
10. One noticed static charges more on _____ days because there is not moisture in the air to "connect" the charges
11. is the charge of one electron (-1.60 x 10-19 Coulombs)
12. Millikan discovered that a charged object's charge is always a multiple of a fundamental charge, e - called...
13. is called Coulomb's Constant
14. shifting of charge within an atom
15. Lines closer together =
16. Charges accumulate at points for
17. If charges are not linear, you must find the x- and y- components and then add the x-components and y-components and use the Pythagorean Theorem to find the resultant force - Called the
18. area around a charge where the charge can be "felt" by another object
19. Electric field is perpendicular to the
20. Electric force is much stronger than
21. Lines drawn from
22. Opposite charges
23. zero electrical resistance when below a certain temperature - can conduct electricity without heating up
24. Electric Field units are
25. F = (kq1q2)/r2
26. materials that allow charges to flow easily from them (most metals)
27. atoms that have gain or lost electrons and therefore have a charge
28. 1 proton balances 1 electron and the net charge is zero
29. two equal in strength, but opposite charges - field lines are identical and turn away from each other
30. Two types of charges:
31. Like any other force, the vector sum of all charge forces acting on an object is called the
32. A neutral conductor is brought near another charged object, then the conductor is grounded - no touching necessary
33. When the Field is negatively charged, the direction is
34. rubbing two materials together - one object rubs the electrons off the other, making it positively charged
35. When the Field is positively charged, the direction is
36. The closer two charges are, the____ the force of attraction or repulsion between them
37. Polarized objects still have a net charge of
38. is the direction of the force on the positive test charge
39. E is a
40. move between material rather than protons
41. The _____ within an insulator can make its surface act like a charged object
42. Only ____ can become charged by induction
43. Electric field is____ inside the conductor
44. Both insulators and conductors can be charged by
45. No net motion of the charges in a
46. conductor connected to the Earth by a conducting wire or copper pipe
47. force between two objects that are not in contact with each other
48. Charges cannot be created or destroyed, they can only be