Recent content by chan1

  1. C

    How can you calculate impedance using the formula Z = R + jX?

    what about when frequency is 100hz, 1khz 10khz? what's th impedance thanks
  2. C

    How can you calculate impedance using the formula Z = R + jX?

    Homework Statement know that the frequency is10hz and 4.7kΩ resistor calculating the impedance in kΩ i spend half hour on this and still have no idea what to do ,tell me the formula or the step thanks Homework Equations The Attempt at a Solution
  3. C

    The potential at the center of the sphere

    Q=R^2E/k , v=kQ/R use these two?
  4. C

    The potential at the center of the sphere

    Homework Statement the electric field at the surface of a charged, solid, copper sphere with radius 0.160m is 3600N/C , directed toward the center of the sphere. what is the potential at the center of the sphere, if we take the potential to be zero infinitely far from the sphere...