Electrostatics Question 740

Question: Flux passing through the shaded surface of a sphere when point charge q is placed when a point charge q is placed at the center is (radius of the sphere is R)

Options:

A) q/ε0

B) q/2ε0

C) q/4ε0

D) zero

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Answer:

Correct Answer: C

Solution:

[c] α=60,

Solid angle subtended by BCD is ω=2π(1cosα)=π

Solid angle subtended ABDE is

ω(ABCDE)ω(BCD)=2ππ=π Hence, flux trough ABDE is ϕ=qε0π4π=q4ε0



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