Doubts
Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents
Sign in to save progress →
Doubts
Sign in

Electrostatics question

2020 · 2 Sep · Shift 2 · Q45
Guest · try one question or challengeGuest · try one question or challenge
  1. PYQ Library
  2. /JEE Main
  3. /Physics
  4. /Electrostatics
  5. /2020 · 2 Sep · Shift 2 · Q45

Electrostatics question

2020 · 2 Sep · Shift 2 · Q45

JEE MainPhysicsElectrostaticsMCQ+4 / −1
A charge Q is distributed over two concentric conducting thin spherical shells radii r and R (R > r). If the surface charge densities on the two shells are equal, the electric potential at the common centre is : JEE Main 2020 (Online) 2nd September Evening Slot Physics - Electrostatics Question 171 English
  1. A
    14πε0(R+r)(R2+r2){1 \over {4\pi {\varepsilon _0}}}{{\left( {R + r} \right)} \over {\left( {{R^2} + {r^2}} \right)}}4πε0​1​(R2+r2)(R+r)​ Q
  2. B
    14πε0(R+r)2(R2+r2)Q{1 \over {4\pi {\varepsilon _0}}}{{\left( {R + r} \right)} \over {2\left( {{R^2} + {r^2}} \right)}}Q4πε0​1​2(R2+r2)(R+r)​Q
  3. C
    14πε0(R+2r)Q2(R2+r2){1 \over {4\pi {\varepsilon _0}}}{{\left( {R + 2r} \right)Q} \over {2\left( {{R^2} + {r^2}} \right)}}4πε0​1​2(R2+r2)(R+2r)Q​
  4. D
    14πε0(2R+r)(R2+r2)Q{1 \over {4\pi {\varepsilon _0}}}{{\left( {2R + r} \right)} \over {\left( {{R^2} + {r^2}} \right)}}Q4πε0​1​(R2+r2)(2R+r)​Q
PreviousNext

More from Electrostatics

  • A small point mass carrying some positive charge on it, is released from the edge of a table. There is a uniform electric field in this region in the horizontal direction. Which of the following options then correctly describe the… Includes diagram2020 · MCQ
  • Two isolated conducting spheres S1 and S2 of radius 32​R and 31​R have 12 μ C and –3 μ C charges, respectively, and are at a large distance from each other. They are now connected by a conducting wire. A long…2020 · MCQ
  • Concentric metallic hollow spheres of radii R and 4R hold charges Q1 and Q2 respectively. Given that surface charge densities of the concentric spheres are equal, the potential difference V(R) – V(4R) is :2020 · MCQ
  • A two point charges 4q and -q are fixed on the x-axis at x = −2d​ and x =2d​ respectively. If a third point charge 'q' is taken from the origin to x = d along the semicircle as shown in the figure, the energy of the… Includes diagram2020 · MCQ
  • Two charged thin infinite plane sheets of uniform surface charge density σ+​ and σ−​, where |σ+​| > |σ−​|, intersect at right angle. Which of the following best represents the electric…2020 · MCQ
  • A particle of charge q and mass m is subjected to an electric field E = E0 (1 – a x2) in the x-direction, where a and E0 are constants. Initially the particle was at rest at x = 0. Other than the initial position the kinetic energy of…2020 · MCQ
  • A solid sphere of radius R carries a charge Q + q distributed uniformly over its volume. A very small point like piece of it of mass m gets detached from the bottom of the sphere and falls down vertically under gravity. This piece carries… Includes diagram2020 · MCQ
  • Ten charges are placed on the circumference of a circle of radius R with constant angular separation between successive charges. Alternate charges 1, 3, 5, 7, 9 have charge (+q) each, while 2, 4, 6, 8, 10 have charge (–q) each. The…2020 · MCQ