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Question

q1,q2,q3 and q4 are point charges located at points as shown in the figure and S is spherical Gaussian surface of radius R. Which of the following is true according to the Gauss’s law.

A
(E1+E2+E3).dA=q1+q2+q32ϵ0
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B
(E1+E2+E3).dA=q1+q2+q3ϵ0
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C
(E1+E2+E3).dA=q1+q2+q3+q4ϵ0
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D
None of the above
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Solution

The correct option is B (E1+E2+E3).dA=q1+q2+q3ϵ0
(E1+E2+E3).dA=q1+q2+q3ϵ0
q4 is outside the closed path.

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