Conductors Definition and 311 Threads

  1. A

    Need help : Conductors and Electric Fields

    Problem: A solid coppper cube is placed in a constant Electric Field in x-direction. The faces of the cube are parallel to xy, yz, xz - plane and one corner is at the origin. Draw the field lines as they would be observed looking down on the cube towards the xy plane. Show at least two...
  2. A

    Thermal conductivity: are liquids better thermal conductors?

    Hello. I just wanted to know if a material in the LIQUID state has a higher thermal conductivity than the same material in the SOLID state. I am thinking specifically about the metals, but I suppose it should be the same for non-metals (or not?).
  3. F

    Capacitance of two spherical conductors

    Given that two spherical conductors of radii r1 and r2 are separated by x>>(both r), connected by a thin wire, and charged with 7 uC - how is the charge distributed between the spheres (no charge on wire)? I tried using charge density but: Qtot/A1+A2 = Q1/A1 + Q/A2 doesn't work by...
  4. M

    Understanding Grounding and Induced Charges on Concentric Spherical Conductors

    Hi, I would like to ask a question about grounding conductors. Suppose we have concentric spherical thin conducting shells (consisting of an inner conductor and an outer conductor). Suppose a charge of +Q is placed on the inner conductor. If we ground the outer conductor, my understanding is...
  5. C

    Charges on Conductors and Gauss's Law

    Can someone give me a couple hints to get me started on this problem, I am not sure where to go next. Infinite line of charge has charge per unit unit length 4.8*10^-6 and lies along the x axis. A second uniform line of charge with charge/unit length -2.4*10^-6 is parallel to the x-axis at...
  6. V

    Calculating Force in Parallel Conductors

    This question actually has nothing to do with homework, since I am not a student, it's simply to satisfy my need for understanding the relationship between force and parallel conductor dynamics.. The ampere is that constant current which, if maintained in two straight parallel conductors of...
  7. A

    Rate of heat transfer and heat conductors

    lets say you have the following situation: you have a cold pool of water, and hot air outside. how do you calculate the rate at which heat is exchanged (given Twater and Tair, the surface area of the pool, etc.)? Now, let's say you add a layer of a certain material x meters thick that has a...
  8. A

    Electric Fields, Insulators, Conductors

    I am going to attach the question along with this post so that you guys can see the questions and the diagram and be able to help me in answering my question better. I found the ccharge on the inner sphere and it is -3.928e-9 and the charge on the outer sphere is 8.15698e-9. Now I have to...
  9. E

    How Do You Calculate Electric Fields of Spherical Charges Using Gauss's Law?

    Here is the problems that's giving me trouble: Positive charge Q is distributed uniformly over each of two spherical volumes of radius R. One sphere of charge is centered at the origin and the other at x=2R. Find the magnitude and direction of the net electric field due to these two...
  10. S

    Learn Super Conductors: Focus on Band Theory?

    Hi, I was wondering, if I wanted to specialize in super conductors, would I have to focus on band theory?
  11. S

    How Can We Use Conductors to Receive EM from Space?

    the concept of wave guide is built that the fielt can't get through the conductiong surface?? but we use conductors to get the EM from space how this could happen can sny one give the ans
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