Download App

STD 12 - 2. Electric potential and capacitance — JEE STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceJEESTD 12 - 2. Electric potential and capacitance4 Marks
MCQ
Three concentric metallic spherical shell $A, B$ and $C$ or radii $a, b$ and $c$ $(a < b < c)$ have surface charge densities $- \sigma , + \sigma ,$ and $- \sigma $ respectively. The potential of shell $A$ is :
  • A
    $(\sigma/ \varepsilon_0 ) [a + b - c]$
  • B
    $(\sigma/ \varepsilon_0 ) [a - b + c]$
  • ✓
    $(\sigma/ \varepsilon_0 ) [b - a - c]$
  • D
    none
✓

Answer

Correct option: C.
$(\sigma/ \varepsilon_0 ) [b - a - c]$
c

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

JEE STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

The values of $x$ and $y$ for which vectors $\vec A = \left( {6\hat i + x\hat j - 2\hat k} \right)$ and $\vec B = \left( {5\hat i - 6\hat j - y\hat k} \right)$ may be parallel are
→
When light is refracted from air into glass
→
A block of mass $10 \,kg$ is kept on a fixed rough $(\mu=0.8)$ inclined plane of angle of inclination $30^{\circ}$. The frictional force acting on the block is ........... $N$
→
The mean value of current for half cycle for a current variation shown by the graph is
→
An electron beam passes through a magnetic field of $2 \times 10^{-3}\,Wb/m^2$ and an electric field of $1.0 \times 10^4\,V/m$ both acting simultaneously. The path of electron remains undeviated. The speed of electron if the electric field is removed, and the radius of electron path will be respectively
→
A small ball is projected up a smooth inclined plane with an initial speed of $10\ m/s$ along the direction at $30^o $ to the bottom edge of the slope. It returns to the edge after $2\, s$. The ball is in contact with the inclined plane throughout the process. ....... $^o$ is the inclination angle of the plane.
→
The height upto which water will rise in a capillary tube will be
→
Figure shows a cubical room $ABCD$ with the wall $CD$ as a plane mirror. Each side of the room is $3\,m$. We place a camera at the midpoint of the wall $AB$. At what distance should the camera be focussed to photograph an object placed at $A$
→
A student plotted the following four graphs representing the variation of velocity of sound in a gas with the pressure $P$. Which one is correct
→
When white light is incident normally on an oil film of thickness $10^{-4} \,cm$ and refractive index $1.4$ then the wavelength which will not be seen in the reflected system of light is ........... $\mathring A$
→