Question

Two equal positive charges are fixed along x - axis at $-a$ and $a$ as shown.


$E_x$ and $E_y$ represent electric field along x - and y- axes respectively and $V$ represents potential.

• A. A $\to$ R, B $\to$ Q, C $\to$ P, D $\to$ S
• B. A $\to$ P, B $\to$ Q, C $\to$ R, D $\to$ S
• C. A $\to$ R, B $\to$ S, C $\to$ P, D $\to$ Q
• D. A $\to$ R, B $\to$ P, C $\to$ Q, D $\to$ S

Answer 1

The correct option is A A $\to$ R, B $\to$ Q, C $\to$ P, D $\to$ S

For a point charge:
V = $\frac{kQ}{r}$
and
E= $\frac{kQ}{r^2}$
So after combining the effects of two point charges,
all the graphs can be plotted.