Im doing my resistance of a wire coursework. If a wire is longer why does the voltage increase and the current decrease?

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  1. physics

    Consider two copper wires with the same cross-sectional area. Wire A is twice as long as wire B. How do the resistivities and resistances of the two wires compare? CHECK ALL THAT APPLY Wire A and wire B have the same resistance. Wire A has twice the

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    A 50.0-g sample of a conducting material is all that is available. The resistivity of the material is measured to be 11 x 10-8 ohms/m and the density is 7.86 g/cm3. The material is to be shaped into a solid cylindrical wire that has a total resistance of

  8. AP Physics

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  10. Physics

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  11. Physics

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  12. physics

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  13. physics

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  16. Physics resistance question

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  17. vectors

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  18. physics

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  19. science

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  20. Physics

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  22. Physics

    You've made the finals of the Science Olympics! As one of your tasks, you're given 1.1g of copper and asked to make a cylindrical wire, using all the metal, with a resistance of 1.7 Ohm. What length l will you choose for your wire? What diameter d will you

  23. physics

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  24. physics

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  25. Physics

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  26. math

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  27. physics

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  28. physics

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  29. Physics

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  30. Physics

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  31. Physics

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  32. Physics

    Two cylindrical copper wires have the same mass and are at the same temperature. Wire A is twice as long as wire B. The resistance of wire A is related to that of wire B by a) RA = RB/4 b) RA = RB/2 c) RA = RB d) RA = 2RB e) RA = 4RB

  33. physics

    a wire has a resistance of 6 ohm it is stretched out to a new length which is three times its original length what is the resistance of the longer wire?assume uniform diameter.resistivity and density are constant

  34. physics

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  35. Physics

    A piece of copper wire is formed into a single circular loop of radius 13 cm. A magnetic field is oriented parallel to the normal to the loop, and it increases from 0 to 0.70 T in a time of 0.45 s. The wire has a resistance per unit length of 3.3 10-2 /m.

  36. Physics

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  37. Physics

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  38. algebra

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  39. Physics

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  40. Physics

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  41. Physics

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  42. physics

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  43. College Physics

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  44. Math

    The electrical resistance of a wire waves directly as its length & inversely as the square of its diameter if a wire 30m long and 0.75mm in diameter has a resistance of 25ohms , find the length of a wire of the same material whose resistance is 30ohms

  45. science

    The resistance of 10m long wire is 10 . Its length is increased uniformly by 25% by stretching the wire uniformly. The resistance of wire will change to (approximately) (A) 12.5 (B) 14.5 (C) 15.6 (D) 16.6

  46. Ap physics b

    A piece of copper wire is formed into a single circular loop of radius 11 cm. A magnetic field is oriented parallel to the normal to the loop, and it increases from 0 to 0.65 T in a time of 0.45 s. The wire has a resistance per unit length of 3.3 10-2 /m.

  47. Physics II

    A 51.0 g sample of a conducting material is all that is available. The resistivity of the material is measured to be 12 10-8 · m, and the density is 7.67 g/cm3. The material is to be shaped into a solid cylindrical wire that has a total resistance of 1.5

  48. Physics

    A piece of copper wire has a resistance per unit length of 5.50 x 10^-3 Ω/m. The wire is wound into a thin, flat coil of many turns that has a radius of 0.200 m. The ends of the wire are connected to a 12.0-V battery. Find the magnetic field strength at

  49. Physics

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  50. Physics

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  52. physics

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  53. science

    Im doing my resistance of a wire coursework. If a wire is longer why does the voltage increase and the current decrease?

  54. Physics

    Two cylindrical copper wires have the same mass and are at the same temperature. Wire A is twice as long as wire B. The resistance of wire A is related to that of wire B by : a) RA = RB/4 b) RA = RB/2 c) RA = RB d) RA = 2RB e) RA = 4RB

  55. physics

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  56. physics

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  57. physics

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  58. physics

    A wire has a resistance of R. What will the wire's resistance be if it is stretched to four times its original length without changing the volume of the wire? (Express in terms of R.) R=V/I; 4R=V/I; R=V/(I/4) I think this is right? help please.

  59. college physics

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  60. physics Important please

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  61. engineering physics 2

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  62. physics

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  63. Physic please help!

    A piece of copper wire is formed into a single circular loop of radius 13 cm. A magnetic field is oriented parallel to the normal to the loop, and it increases from 0 to 0.70 T in a time of 0.45 s. The wire has a resistance per unit length of 3.3 10-2 /m.

  64. Math

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  65. Physics - Electricity

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  67. physics

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  68. university, physics.

    A length of wire has a radius of 3.00 ~ 10-3 m and a resistance of 0.200 ƒ¶. When the potential difference across the wire is 10.0 V, the electron drift speed is found to be 2.98 ~ 10-4 m/s. On the basis of these data, calculate the density of free

  69. Physics. Free electron density, please help!

    A length of wire has a radius of 3.00 × 10-3 m and a resistance of 0.200 Ω. When the potential difference across the wire is 10.0 V, the electron drift speed is found to be 2.98 × 10-4 m/s. On the basis of these data, calculate the density of free

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  71. physics

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  72. Physics repost

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  73. physics

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  74. Electricity help needed please

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  75. physics

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  76. physics, university

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  77. Physics

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  78. college algebra

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  79. PHYSICS

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  80. Physics

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  81. physics/electrical circuits

    a wire has a resistance of 1 ohm if the length is increased four times and the area is double the original, find the new resistance of the wire.

  82. physics

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  83. physics

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  84. Math word problem

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  85. physics

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  86. Physics

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  87. physics

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  90. PHYSICS

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  93. Physics

    You've made the finals of the Science Olympics! As one of your tasks, you're given 1.8g of copper and asked to make a wire, using all the metal, with a resistance of 1.3 Ohm. Copper has a density of 8900 kg/m^3. What length will you choose for your wire(in

  94. Physics

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  95. Physics

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  96. help with physics

    A gold wire and a silver wire have the same dimensions. At what temperature will the silver wire have the same resistance that the gold wire has at 20°C?

  97. Physics

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  98. physics

    A potential difference of 12 V produces a current of 0.90 A in a piece of copper wire. What is the resistance of the wire?

  99. Science

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  100. Physics

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