| (a) | always continuous. |
| (b) | continuous if there is no charge at that point. |
| (c) | discontinuous only if there is a negative charge at that point. |
| (d) | discontinuous if there is a charge at that point. |
1. (a), (b)
2. (b), (d)
3. (c), (d)
4. (a), (d)
(2) Hint: The electric field lines originate from a positive charge and end at a negative charge.
The electric field due to a charge Q at a point in space may be defined as the force that a unit positive charge would experience if placed at that point. Thus, the electric field due to the charge Q will be continuous, if there is no charge at that point. It will be discontinuous if there is a charge at that point.
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