A sphere of radius $R$ and charge $Q$ is placed inside a concentric imaginary sphere of radius $2R$. The flux associated with the imaginary sphere is
$\frac{Q}{{{\varepsilon _0}}}$
$\frac{Q}{{{2\varepsilon _0}}}$
$\frac{Q}{{{3\varepsilon _0}}}$
$\frac{Q}{{{4\varepsilon _0}}}$
Linear charge density of wire is $8.85\,\mu C/m$ . Radius and height of the cylinder are $3\,m$ and $4\,m$ . Then find the flux passing through the cylinder
How does the electric field lines depend on area ?
A point charge $+10\; \mu \,C$ is a distance $5 cm$ directly above the centre of a square of side $10 \;cm ,$ as shown in Figure. What is the magnitude of the electric flux through the square?
Is electric flux scalar or vector ?
Three positive charges of equal value $q$ are placed at the vertices of an equilateral triangle. The resulting lines of force should be sketched as in