Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents

Your guest activity stays on this device

Sign in to save progress →
Sign in

Electrostatics question

2012 · Q172
Guest · filters and generic practice availableBrowsing as a guest · PYQ filters and generic practice are available. Sign in only for personalised features and saved progress.
  1. PYQ Library
  2. /NEET
  3. /Physics
  4. /Electrostatics
  5. /2012 · Q172

Electrostatics question

2012 · Q172

NEETPhysicsElectrostaticsMCQ+4 / −1
What is the flux through a cube of side aaa if a point charge of q is at one of its corner?
  1. A
    2qε0{{2q} \over {{\varepsilon _0}}}ε0​2q​
  2. B
    q8ε0{q \over {8{\varepsilon _0}}}8ε0​q​
  3. C
    qε0{q \over {{\varepsilon _0}}}ε0​q​
  4. D
    q2ε06a2{q \over {2{\varepsilon _0}}}6{a^2}2ε0​q​6a2
View written solutionFree

Correct answer: B

AIPMT 2012 Prelims Physics - Electrostatics Question 57 English Explanation

Eight identical cubes are required so that the given charge q appears at the centre of the bigger cube.
Thus, the electric flux passing through the given cube is

ϕ=18(qε0)=q8ε0\phi = {1 \over 8}\left( {{q \over {{\varepsilon _0}}}} \right) = {q \over {8{\varepsilon _0}}}ϕ=81​(ε0​q​)=8ε0​q​

PreviousNext

More from Electrostatics

  • Four point charges −Q, −q, 2q and 2Q are placed, one at each corner of the square. The relation between Q and q for which the potential at the centre of the square is zero is2012 · MCQ
  • Three charges, each +q, are placed at the corners of an isosceles triangle ABC of sides BC and AC, 2a. D and E are the mid points of BC and CA. The work done in taking a charge Q from D to E is Includes diagram2011 · MCQ
  • The electric potential V at any point (x, y, z), all in metres in space is given by V = 4x2 volt. The electric field at the point (1, 0, 2) in volt/meter, is2011 · MCQ
  • Four electric charges +q, +q, − q and − q are placed at the corners of a square of side 2L (see figure). The electric potential at point A, midway between the two charges + q and +q, is Includes diagram2011 · MCQ
  • A charge Q is enclosed by a Gaussian spherical surface of radius R. If the radius is doubled, then the outward electric flux will2011 · MCQ
  • The electric field at a distance 23R​ from the centre of a charged conducting spherical shell of radius R is E. The electric field at a distance 2R​ from the centre of the sphere is2010 · MCQ
  • A square surface of side L meter in the plane of the paper is placed in a uniform electric field E(volt/m) acting along the same plane at an angle θ with the horizontal side of the square as shown in figurre. The electric flux… Includes diagram2010 · MCQ
  • Two positives ions, each carrying a charge q, are separated by a distance d. If F is the force of repulsion between the ions, the number of electrons missing from each ion will be (e being the charge on an electron)2010 · MCQ