Electrostatics Question 507
Question: Three infinitely long charge sheets are placed . The electric field at point P is [IIT-JEE (Screening) 2005]
Options:
A) $ \frac{2\sigma }{{\varepsilon _{o}}} $ $ \hat{k} $
B) $ -\frac{2\sigma }{{\varepsilon _{o}}} $ $
C) $ \frac{4\sigma }{{\varepsilon _{o}}} $ $
D) $ -\frac{4\sigma }{{\varepsilon _{o}}} $ $ \hat{k} $
Show Answer
Answer:
Correct Answer: B
Solution:
$ \vec{E}=-\frac{\sigma }{2{\varepsilon _{o}}}\hat{k}-\frac{2\sigma }{2{\varepsilon _{o}}}\hat{k}-\frac{\sigma }{2{\varepsilon _{o}}}\hat{k}=-\frac{2\sigma }{{\varepsilon _{o}}}\hat{k} $
