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

ERh2

d

Eh22

answer is B.

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Detailed Solution

The effective area through which the flux is entering the cone is a triangle with base 2R and height h.Area of triangle A=12×2R×h=RhElectric Flux = EA =ERh
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