Question

If a negative charge is kept at point $\text{P}$ in the electric field of two charges then it will initially accelerate along

• A. $\text{PS}$
• B. $\text{PT}$
• C. $\text{PQ}$
• D. $\text{PR}$

Answer 1

The correct option is D $\text{PR}$

We know that, tangent at any point on electric lines of force gives the direction of electric field.

Thus, at point $\text{P}$, the electric field is directed along $\text{PQ}$.

Further,
$\overrightarrow{F}=q\overrightarrow{E}$

for negative test charge,

$\overrightarrow{F}=-q\overrightarrow{E}$ $($along $\text{PR})$

Therefore, test charge will initially accelerate along $\text{PR}$.

So, $\left(c\right)$ is the correct option.