KVPY SX SB Exam 19-Nov-2017 Question Paper

Question : 31 of 120

Marks: +1, -0

The black shapes in the figure below are closed surfaces. The electric field lines are in red. For which case the net flux through the surfaces is non-zero ?

In all cases net flux is non-zero
Only (c) and (d)
Only (a) and (b)
Only (b), (c) and (d)

Validate

Solution:

ϕ=q_\en/ε_0

q_\en

is not zero for a and b. therefore flux (ϕ) is not zero.

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