Question

The spatial distribution of the electric field due to two charges (A,B) is shown in figure. Which one of the following statements is correct?

• A. A is +ve and B -ve and $\left|A\right|>\left|B\right|$
  
• B. A is +ve and B -ve and $\left|A\right|=\left|B\right|$
  
• C. Both are +ve but $\left|A\right|>\left|B\right|$
• D. Both are -ve but $\left|A\right|>\left|B\right|$

Answer 1

The correct option is B A is +ve and B -ve and $\left|A\right|=\left|B\right|$


The field lines go out of charge A and go towards charge B. Hence A is positive charge and B is negative charge.
Since, the field lines are symmetrical and field line density are same near A and B.
Hence, magnitude of charge at A is equal to magnitude of charge at B.