1) Location A is 3.00 m from a charge of -3.00 x 10-8 C, while location B is 2.00 m from the charge. Find the potential difference Vg - Va between the two points, and state which point is at the higher potential.
2. What is the electrical potential difference between apoint 1.00 x 10-10 m from an electron and another point I 5.00 x 10-10 m from the electron?
3. A0.47 pF parallel plate capacitor has 7.1 x 10-5 C of charge on its plates which are separated by 0.052 mm. What is the magnitude of the electric fieldbetween the plates?
4. An empty 15 pF parallel plate capacitor is charged by a 12 V battery. The battery remains connected, and the region between the plates of the capacitor is filled with pure water. What is the new capacitance of the capacitor and the new charge on the plates ofthe capacitor?
5. A positive and a negative charge have the same magnitude of charge and are located 2.0 mm apart. Where in the region around the charges is the electrical potential zero?
6. Sketch the electric field lines and equipotential surfaces in the region around two positive charges of equal magnitude separated by a small distance. Label the regions of relatively high and low potential.
7.The electron in the Bohr model of the hydrogen atom is asumed to move in a circular orbit while the proton in the nucleus is stationary. The total mechanical energy E of the electron is the sum of the kinetic energy and electric potential energy EPE. What is the ratio EPE/E?
8.An air filled parallel plate capacitor has a plate separation of 0. 15 mm. What plate area is required for the capacitor to have a capacitance of 33 pF?
9. Two parallel plate capacitors, one air filled and fte other filled with paper, are otherwise identical and hold the same charge, q. Which capacitor has stored more energy? How much more?