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STD 12 - 1. Electric charges and fields — JEE STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceJEESTD 12 - 1. Electric charges and fields4 Marks
MCQ
Gauss’s law states that
  • A
    the total electric flux through a closed surface is $\frac{1}{\varepsilon_0}$ times the total charge placed near the closed surface.
  • ✓
    the total electric flux through a closed surface is $\frac{1}{\varepsilon_0}$ times the total charge enclosed by the closed surface.
  • C
    the total electric flux through an open surface is $\frac{1}{\varepsilon_0}$ times the total charge placed near the open surface.
  • D
    the line integral of electric field around the boundary of an open surface is $\frac{1}{\varepsilon_0}$ times the total charge placed near the open surface.
✓

Answer

Correct option: B.
the total electric flux through a closed surface is $\frac{1}{\varepsilon_0}$ times the total charge enclosed by the closed surface.
b
Gauss's law is applicable only for closed surface and for the charge placed inside it not near it.

Total electric flux, $\phi_{ z }=\frac{1}{\varepsilon_0} Q$

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