Recent content by kirby2

  1. K

    Potential and field at two electric plates

    and the other answers are wrong, correct?
  2. K

    Capacitor network finding potential

    3.1E-6 is from series. so you add them by 1/C and the answer is 1/c. so for the first one i did 1/8.6E-6 + 1/4.8E-6 = 1/C where C is 3.1E-6 4.1E-6 is also from series. i did 1/6.2E-6 + 1/11.8E-6 = 1/C where C is 4.1E-6. 7.6E-6 is parallel so you just add them. i added 4.1E-6 to 3.5E-6
  3. K

    Capacitor network finding potential

    final capacitance = 1.48E-5 F. i combined 3.1E-6, 4.1E-6 and 7.6E-6
  4. K

    Capacitor network finding potential

    i did this in three steps. i found C from the first two as a series. then i found c from the top two as a series. then i used my answer from the top two and the lower capacitator as a parallel network. so in the last calculation i did 4E-6. AH! there is my mistake. before i had my old...
  5. K

    Capacitor network finding potential

    3.1e-6 + 4e-6 + 4.9e-6
  6. K

    Capacitor network finding potential

    ok. adding all the Cs gives me 1.2E-5. i plugged this into the formula U=.5CV^2. for v i used 12 and solved for u
  7. K

    Capacitor network finding potential

    my bad. i dont know what i did wrong, but i redid it and got u=8.64E-4.
  8. K

    Capacitor network finding potential

    i then got a total capatance of 1.21E-5 F and a total energy of 0.0027 J
  9. K

    Capacitor network finding potential

    i re-did it and got 4E-6. is this right?
  10. K

    Capacitor network finding potential

    For the capacitor network shown in the figure, the potential difference across ab is 12V. Find (a) the total energy stored in this network and (b) the energy stored in the 4.8 uF capacitor. figure: http://i.imgur.com/Wxbuu.png ATTEMPT: PART A: i first did the leftmost 2 capacitors...
  11. K

    Charge sprayed onto a conductor

    An irregular neutral conductor has a hollow cavity inside of it and is insulated from its surroundings. An excess charge of 16.0 nC is sprayed onto this conductor. A) Find the charge on the inner surface of the conductor. B) Find the charge on the outer surface of the conductor. C) Without...
  12. K

    Electric flux through a cube

    A point charge 6.50 nC is at the center of a cube with sides of length 0.260 m. PART A: What is the electric flux through the surface of the cube? PART B: What is the electric flux through one of the six faces of the cube? ATTEMPT: A) Total flux enclosed by the cube = Q / eo...
  13. K

    Traveling proton and electric field problem

    A proton is traveling horizontally to the right at 4.20×106 m/s. Find (a)the magnitude and (b) direction (counterclockwise from the left direction) of the weakest electric field that can bring the proton uniformly to rest over a distance of 3.40 cm. Part C: How much time does it take the...
  14. K

    Uniform charged ball charge density problem

    my last response's answer is in C/m^3. (2.387E-6) is this one right?
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