physics

10. A length L of wire has a charge density of  C/m. What is the electric field at an axial distance r from the wire if L is 5 meters,  is 5 x 10-8 C/m and r is 10 cm. Use Gauss’s Law to solve.

  1. 👍 0
  2. 👎 0
  3. 👁 176
  1. I suspect a typo here.
    Yes, use Gauss's law if the length is great compared to the distance r
    here L = 5 and r = 0.1
    Area of cylinder around wire at distance r is 2 pi r L

    integral of E coming out of surface = charge inside /eo
    so
    2 pi r L E = 5*10^-8 L /eo
    so
    E = 5*10^-8 /(2 pi eo) = 10*10^-8 /(4 pi eo)

    = 10^-7 k

    1. 👍 0
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. phys102

    a copper wire has a diameter of 1.02mm,the wire carries a constant current of 1.67A,the density of the free electrons is 8.5X10^28 e/m^3.calculate the current density and drift velocity

  2. Physics

    If a wire of resistance R is stretched uniformly to 2.8 times its initial length, by what factor does the power dissipated in the wire change, assuming it remains hooked up to the same voltage source? Assume the wire's volume and

  3. Physics!! Help!!!!!

    A wire of length L and cross-sectional area A has resistance R. What will be the resistance R_stretched of the wire if it is stretched to twice its original length? Assume that the density and resistivity of the material do not

  4. Physics

    1. A force of 40N at the end of a wire of length 4m and diameter 2mm process and extension of 0.24mm. Calculate; (a) stress on the wire (b) strain in the wire (c) Young's Modulous for the material of the wire (π=3.14)

  1. physics

    A long, thin straight wire with linear charge density -λ runs down the center of a thin, hollow metal cylinder of radius R. The cylinder has a net linear charge density 2λ. Assume λ is positive. Find expressions for the

  2. physic

    A long straight horizontal wire carries a current = 3.90 A to the left. A positive 1.00 C charge moves to the right at a distance 1.50 m above the wire at constant speed v = 5000 m/s. What is the magnitude of the magnetic field at

  3. Chemistry

    If the copper is drawn into wire whose diameter is 9.50 , how many feet of copper can be obtained from the ingot? The density of copper is 8.94 . (Assume that the wire is a cylinder whose volume is , where is its radius and is its

  4. physics

    You place a point charge q = -4.00 nC a distance of 9.00 cm from an infinitely long, thin wire that has linear charge density 3.00×10−9C/m. What is the magnitude of the electric force that the wire exerts on the point charge?

  1. Physics concept question

    A long straight horizontal wire carries a current I = 2.10 A to the left. A positive 1.00 C charge moves to the right at a distance 4.50 m above the wire at constant speed v = 2250 m/s. What are the magnitude and the direction of

  2. physics

    As part of a class project you are given 0.900 g of nichrome and asked to fabricate a wire with uniform cross-section. You use up 95% of the nichrome and make a wire with a resistance of 0.840 Ω. The resistivity of nichrome is

  3. Physics

    9. Figure shows an aluminium wire of length 60 cm joined to a steel wire of length 80 cm and stretched between two fixed supports. The tension produced is 40 N. The cross-sectional area of the steei wire is 1.0 mm2 and that of the

  4. physics

    A 8.95 μC point charge is glued down on a horizontal frictionless table on the right. If is tied to a -6.35 μC point charge by a light nonconducting wire with length 2.5 cm on the left. The charges are placed in a external,

You can view more similar questions or ask a new question.