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  1. J

    Electrostatics - 3rd plate inserted into parallel plate capacitor

    You can think of these problems in relation to their fields if you want (you wouldn't be wrong), but I have found examining E&M problems by their potentials is much easier (in the case of electrostatics you don't have to worry about vector quantities, just scalar ones). So yes, b/c of...
  2. J

    Electrostatics - 3rd plate inserted into parallel plate capacitor

    Once the new plate is added, you have a three plate system. When writing the integral out from 0 to d, you have to break it into two parts, 0 to .5d and .5d to d. You only calculated the lower half of the integral (center plate to 0 potential plate). The plate held at V is held at V relative...
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