| A | B |
|---|
| How many electrons make up a charge of -30 microcoulombs? | 1.873 x 10^14 electrons |
| Two charged smoke particles exert a force of 4.2 x 10^-2 N on each other. What will be the force if they are moved so they are only one eighth as far apart? | 2.688 N |
| Two charged balls are 20.0 cm apart. They are moved, and the force on each of them is found to have been tripled. How far apart are they now? | 11.5 cm |
| What is the magnitude of the electric force of attraction between an iron nucleus (q = +26e) and its innermost electron if the the distance between them is 1.5 x 10^-12 m? | 2.7 x 10^-3 N |
| What is the repulsive electrical force between two protons in a nucleus that are 5.0 x 10^-15 m apart from each other? | 9.2 N |
| What is the magnitude and direction of the electric force on an electron in a uniform electric field of strength 3500 N/C that points due east? | -5.6 x 10^-16 N (west) |
| A proton is released in a uniform electric field, and it experiences an electric force of 3.2 x 10^-14 N toward the south. What are the magnitude and direction of the electric field? | 2.0 x 10^5 N/C (south) |
| A force of 8.4 N is exerted on a -8.8-microcoulomb charge in a downward direction. What is the magnitude and direction of the electric field at this point? | -9.5 x 10^5 N/C (up) |
| What is the magnitude and direction of the electric field 30.0 cm directly above a 33 x 10^-6-C charge? | 3.3 x 10^6 N/C (up) |
| What is the magnitude of the acceleration experienced by an electron in an electric field of 600 N/C? | -1.05 x 10^14 m/s^2 |
