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Q.

A cone of base radius R and height h is located in a uniform electric field E¯ parallel ot its base. The electric flux entering the cone is :

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a

EhR

b

2EhR

c

4EhR

d

12EhR

answer is D.

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Detailed Solution

ϕ=EA;A→ area of the triangle perpendicular to field.

Base = 2R & height = h

⇒A=12×2R×h

⇒ϕ=ERh

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