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  1. K

    Capacitors & Dielectrics

    Homework Statement Two capacitors are identical, except that one is empty and the other is filled with a dielectric (κ = 3.20). The empty capacitor is connected to a 11.0-V battery. What must be the potential difference across the plates of the capacitor filled with a dielectric such that it...
  2. K

    Two Charges, Find Spot of Zero Potential

    Homework Statement Charges of -q and +2q are fixed in place, with a distance d = 6.00 m between them. A dashed line is drawn through the negative charge, perpendicular to the line between the charges. On the dashed line, at a distance L from the negative charge, there is at least one spot...
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    Electrical Forces, Torque & Flux

    Homework Statement A long, thin rod (length = 4.0 m) lies along the x axis, with its midpoint at the origin. In a vacuum, a +6.0 C point charge is fixed to one end of the rod, and a -6.0 C point charge is fixed to the other end. Everywhere in the x, y plane there is a constant external...
  4. K

    Net Force of Point Charges, Coulomb's law

    Homework Statement The drawing shows three point charges fixed in place. The charge at the coordinate origin has a value of q1 = +8.02 C; the other two have identical magnitudes, but opposite signs: q2 = -4.73 C and q3 = +4.73 C. (a) Determine the net force exerted on q1 by the other two...
  5. K

    Coulomb's Law & Electrons

    Homework Statement Two spherical objects are separated by a distance of 1.98 x 10-3 m. The objects are initially electrically neutral and are very small compared to the distance between them. Each object acquires the same negative charge due to the addition of electrons. As a result, each...