Electrostatics Question 233
Question: A point charge q is placed at a distance a/2 directly above the centre of a square of side a. The electric flux through the square is [MP PMT 1997; AMU 1999]
Options:
A) $ \frac{q}{{\varepsilon _{0}}} $
B) $ \frac{q}{\pi {\varepsilon _{0}}} $
C) $ \frac{q}{4{\varepsilon _{0}}} $
D) $ \frac{q}{6{\varepsilon _{0}}} $
Show Answer
Answer:
Correct Answer: D
Solution:
An imaginary cube can be made by considering charge q at the centre and given square is one of it’s face. So flux from given square (i.e. one face) $ \varphi =\frac{q}{6{\varepsilon _{0}}} $
