Question

Direction of electric field? See picture

Answer 1

A

Explanation:

Electric field is electric force per unit charge. And the direction of the field is the direction of the electric force it would exert on a positive test charge.

If a positive test charge is placed at point `P`.
Force due to `+Q` charge on the test charge would be repulsive. Therefore, direction of force at `P` would be away from `+Q`
`vecE_([+Q]->P)`

Similarly, force due to `-Q` charge on the test charge would be attractive. Therefore, direction of force at `P` would be towards `-Q`
`vecE_(P->[-Q])`

Draw two vectors at point `P` of equal magnitude and directions as discussed above. The resultant of these two vectors will point in a direction as shown in the figure below.