| |
|
|
| |
 |
| Numerical 03 |
|
| 03. Find the force on the centre charge in the figure below. |
| |
 |
| |
| Suggested answer: |
| |
| Let F1 be the magnitude of the force with which charge q2 is attracted towards q1. |
| |
| We know that |
| |
 |
| |
 |
| |
 |
| |
 |
| |
| |
| |
| If F2 is the magnitude of the force with which charge q2 is attracted towards q3, then |
| |
| |
 |
| |
 |
| |
| Net force F experienced by q2 is directed towards q1 and is given by |
| |
| F = F1 - F2 = (0.0450 - 0.0169)N |
| |
| = 0.0281N |
| |
| Note: The signs of the charges are not employed in the use of Coulomb's law because these are implicit in the direction of the forces. |
| |
|
|
| |
|
|
| |
|
|
|
|
|
Electric Charges and Field
|
|
|
