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} $

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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} $



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