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58 Multiple choice questions

  1. a device that is designed to store charge to be released at a later point in time
  2. a closed loop pathway that allows for current to flow from a power source, through an electrical element, and back to the power sources - current can only flow within a closed loop circuit due ot the fact that it must return to the power source
  3. (change in)V=W(on)q´/q´
  4. one joule per coulomb (J/C=V)
  5. a closed, loop electrical ciruit with only 1 path for current to flow; the amount of current that flows within the circuit is equal in each element
  6. an electrical connection between electrical elements in which there are two or more pathways for current to flow
  7. a device used to measure the voltage drop across a poriton of a circuit - connected in parallel with resistor
  8. an electric outlet that prevents injuries (electrocution) because it contains an electric circuit that detects small differences in current cause by an extra current path and opens the circuit
  9. an automatic switch that opens when the current reaches a threshold value
  10. OHMS
  11. occurs when a circuit with a very low resistance is formed - the low resistance causes the current to be very large, and when appliances are connected in parallel, each additional appliance placed in operation reduces the equivalent resistance in the circuit and increases the current through wires. The additional current might produce enough thermal energy to melt the wiring's insulations, cause a short circuit, or even begin a fire.
  12. the process of connecting a body to Earth to eliminate excess charge
  13. V=V1+V2+V3...(ADD)
  14. a pictoral way for explaining the nature of the electrostatic field. In particular, for showing the direction fo the field when you have like and unlike charges.
  15. The separation of electric charges
  16. the sum of all the individual resistances (R=Ra+Rb+Rc+...)
  17. the flow of positive charges
  18. (V) the work done moving a positive test charge between two points in an electric field divided by the magnitude of the test charge
  19. a material through which a charge will not move easily is called an electric ___
  20. a closed, loop electrical circuit in which two or more paths for current to flow exist; Electric Potential Difference (V) is the same for each path
  21. A condition that must exist between two points in a conductor in order to maintain a flow of charge
  22. an electrical element within a circuit that utilizes current flow and can be wired within a series or parallel connection to other elements;
  23. V=V1=V2=V3...(EQUAL)
  24. a material that allows charges to move about easily is called an electric ___
  25. I=V/R
  26. (change in)V=Ed
  27. a material with zero resistance -there is no restriction of current in superconductors, so there is no potential difference across them
  28. True
  29. a circuit which includes series and parallel branches
  30. consists of a metal knob connected by a metal stem to two thin, lightweight pieces of metal foil, called leaves
  31. the study of electric charges that can be collected and held in one place
  32. a flow of charged particles
  33. R=R1+R3.....
  34. an electrical connection between electrical elements in which there is only one pathway for current to flow
  35. I=I1=I2=I3....(EQUAL)
  36. E=F/q´
  37. the ratio of charge to electric potential difference - measured in Farads (F) - charge is usually small
  38. real, actual areas that surround a charged object for which the object may exert a force on another object
  39. charging a neutral body by touching it with a charged body
  40. E= F(on)q´/q´
  41. the amount of charge that moves through an electrical circuit per unit of time - measured 1 coulomb per second - 1C/s=A ampere
  42. R=V/I
  43. 1/R=1/R1+1/R2...
  44. the SI standard unit of charge
  45. a short piece of metal that melts when too large a current passes through it
  46. when the positive charge of the nucleus equals the negative charge of the surrounding electrons, then the atom is ___
  47. I=q/t
  48. g=F/m
  49. the magnitude of the force between charge q(A) and charge q(B), seperated by a distance r, is proportional to the magnitude of the charges and inversely proportional to the square of the distance between them.
  50. a series circuit used to produce a voltage source of disired magnitude from a higher-voltage battery
  51. F=K(q1+q2)/r^2
  52. a measure of the degree to which an electrical element impedes the flow of current within a circuit as it utilizes the current flow in order to operate - measured in Ohms (Ω)
  53. I=I1+I2+I3....(ADD)
  54. C=q/(change in)V
  55. The magnitude of the charge of an electron (1.60e-19)
  56. Charging an object without direct contact between the object and a charge
  57. a device that is used ot measure the current in any branch or part of a circuit
  58. P=IV, P=(I^2)(R), P=(V^2)/(R)