Electrostatics Question 669
Question: Variation of electrostatic potential along the $ x $ -direction is shown in . The correct statement about electric field is
Options:
A) $ x $ -component at point B is maximum
B) $ x $ -component at point A is toward positive $ x $ -axis
C) $ x $ -component at point C is along negative $ x $ -axis
D) $ x $ -component at point C is along positive $ x $ - axis
Show Answer
Answer:
Correct Answer: D
Solution:
[d] We know,
$ E=-\frac{dV}{dx}. $
At B, dV/dx=0, hence $ E _{x}=0 $ At A, dV/dx is positive, hence $ E _{x} $ is negative.
At C, dV/dx is negative, hence $ E _{x} $ is positive.
