Q.

A cone lies in a uniform electric field E as shown in figure. The electric flux entering the cone is

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a

EπR2

b

ERh

c

EhR2

d

Eh2

answer is B.

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Detailed Solution

Plane normal to electric field is a triangle with base length 2R and height h.Area of triangle A = 12 x 2Rh = RhElectric flux entering the cone = EA = ERh
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