Question

The variation of electric field between two charge `q_1` and `q_2` along the line joining the charges is plotted against distance from `q_1` (taking rightward direction of electric field as positive) as shown in the figure. Then the correct statement is

A. `q_1` and `q_2` are positive and `q_1ltq_2`
B. `q_1` and `q_2` are positive and `q_1gtq_2`
C. `q_1` is positive and `q_2` is negative `q_1lt|q_2|`
D. `q_1 and q_2` are negative and `|q_1|lt|q_2|`

Answer 1

Correct Answer - A
Just to the right to `q_1` electric field is `+alpha` or in positive direction (away from `q_1)` Hence `q_1` is positive. Just to the left `q_2` electric field is `-alpha` or towards left (or away from `q_2` Hence `q_2` is also positive.
further E=0 near `q_1`. Hence
`q_1ltq_2`