Two concentric hollow metallic spheres of radii $r_1$ and $r_2 (r_1 > r_2)$ contain charges $q_1$ and $q_2$ respectively. The potential at a distance $x$ between $r_1$ and $r_2$ will be
$\frac{{{q_1} + {q_2}}}{{4\pi {\varepsilon _0}x}}$
$\frac{{{q_1}}}{{4\pi {\varepsilon _0}{r_1}}} + \frac{{{q_2}}}{{4\pi {\varepsilon _0}{r_2}}}$
$\frac{{{q_1}}}{{4\pi {\varepsilon _0}x}} + \frac{{{q_2}}}{{4\pi {\varepsilon _0}{r_2}}}$
$\frac{{{q_1}}}{{4\pi {\varepsilon _0}{r_1}}} + \frac{{{q_2}}}{{4\pi {\varepsilon _0}x}}$
A spherical conductor of radius $2\,m$ is charged to a potential of $120\,V.$ It is now placed inside another hollow spherical conductor of radius $6\,m.$ Calculate the potential to which the bigger sphere would be raised......$V$
An electric field $\vec E\, = (25 \hat i + 30 \hat j)\,NC^{-1}$ exists in a region of space. If the potential at the origin is taken to be zero then the potential at $x\, = 2\, m, y\, = 2\, m$ is......$volt$
Four charges $2C, -3C, -4C$ and $5C$ respectively are placed at all the corners of a square. Which of the following statements is true for the point of intersection of the diagonals ?
The give graph shown variation (with distance $r$ from centre) of
If the electric potential of the inner metal sphere is $10$ $ volt$ $\&$ that of the outer shell is $5$ $volt$, then the potential at the centre will be ......$volt$