Electrostatics 2 Question 11
12. Positive and negative point charges of equal magnitude are kept at $(0,0, a / 2)$ and $(0,0,-a / 2)$, respectively. The work done by the electric field when another positive point charge in moved from $(-a, 0,0)$ to $(0, a, 0)$ is
$(2007,3$ M)
(a) positive
(b) negative
(c) zero
(d) depends on the path connecting the initial and final positions
Show Answer
Answer:
Correct Answer: 12. (b)
Solution:
- $A \equiv(-a, 0,0), B \equiv(0, a, 0)$
Point charge is moved from $A$ to $B$
$$ V _A=V _B=0 \Rightarrow W=0 $$
or the correct option is (c).
