Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NEET 2012
Exam
NEET
Year
2012
Subject
Physics
Chapter
Electrostatics

NEET 2012 · Physics · Electrostatics

What is the flux through a cube of side a if a point charge of q is...

What is the flux through a cube of side aa if a point charge of qq is a one of its corner?

Options

  1. A2qε0\frac{2 q}{\varepsilon_0}
  2. Bq8ε0\frac{q}{8 \varepsilon_0}
  3. Cqε0\frac{q}{\varepsilon_0}
  4. Dq2ε06a2\frac{q}{2 \varepsilon_0} 6 a^2

Correct answer

B. q8ε0\frac{q}{8 \varepsilon_0}

Step-by-step solution

Charge enclosed =q/8=q / 8Therefore, flux ϕ=qenclosed ε0ϕ=q8ε0\begin{aligned} & \text{Therefore, flux } \\ & \phi =\frac{q_{\text{enclosed }}}{\varepsilon_0} \\ & \phi =\frac{q}{8 \varepsilon_0} \end{aligned}$$
Practice Electrostatics on Quantrex Academy →

More from Electrostatics

The electric field at a point in a certain region of free space due to a charge Q is 0.… MHT CET Medical 2026A closed surface encloses n electric dipoles. The net electric flux through the closed… MHT CET Medical 2026A hollow metal sphere of radius 5\ cm is charged such that the potential on its surface… MHT CET Medical 2026Four infinitely large planar charged sheets are placed parallel to each other as shown in… MHT CET Medical 2026The electric potential 'V' as a function of distance x (in metre) is V = 4x^2 + 6x - 8… MHT CET Medical 2026A uniform electric field is given as E = 4 × 10^4\, j \ N/C . The flux of this field… MHT CET Medical 2026Assume that the electric field E = 30 x^2 i exists in space. Then the potential… MHT CET Medical 2026Two point charges +8q and -2q are located at x=0 and x=L respectively. What is the… MHT CET Medical 2026 Full Electrostatics list All NEET PYQs