Embibe Experts Solutions for Exercise 4: EXERCISE 2.4

Consider a hollow spherical conductor that has a potential of $300$ volts at its outside surface. The potential inside the hollow must be

Two copper spheres of same radii (one hollow and other solid) are charged to the same potential then

A hollow metal sphere of radius $5 \mathrm{cm}$ is charged such that the potential on its surface is $10 \mathrm{V}$. The potential at a distance of $2 \mathrm{cm}$ from the centre of the sphere is

Electric field and potential inside hollow charged conducting sphere are respectively ($q=$ charge on sphere, $R=$ Radius of sphere, $r=$ distance from centre of sphere)

Two insulated charged conducting spheres of radii $20 \mathrm{cm}$ and $15 \mathrm{cm}$, respectively and having an equal charge of $10 \mathrm{\mu C}$ are connected by a copper wire and then, they are separated. Then,

A solid conducting sphere having a charge $Q$ is surrounded by an uncharged concentric conducting hollow spherical shell. Let the potential difference between the surface of the solid sphere and that of the outer of hollow shell be $V.$ If the shell is now given a charge of $-3Q,$ the new potential difference between the same two surface is,

In a uniform electric field $E=100 \mathrm{V} {\mathrm{m}}^{-1},$ the potential difference $V_A-V_B,$ where $AB=10\sqrt{2} \mathrm{m},$ is

A soap bubble of radius $3 \mathrm{cm}$ is charged with $9.0 \mathrm{nC}.$ The excess pressure inside the bubble, if surface tension of soap solution $=3\times {10}^{-3} \mathrm{N} {\mathrm{m}}^{-1}$ is