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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