Electric Charges and Fields Quiz-1

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Electric charges; Conservation of charge; Coulomb’s law: electrostatic force between two point charges; forces between multiple charges; superposition principle and continuous charge distribution.

1. The dimension of electric flux is
2. The electrostatic force between two charges a distance $r$ apart in a vacuum is $F$. The force between the same charges a distance $r/2$ apart in a medium of dielectric constant $2$ is
3. A proton at rest has charge $e$. When it moves with a high speed, its charge
4. If $F_e$ and $F_g$ are the electric and gravitational forces respectively between an electron and proton situated at a distance apart, the ratio of $F_e$ and $F_g$ is of the order of
5. The value of $\frac{1}{4\pi\epsilon_0}$ in SI unit is
6. Force $\vec{F}$ between two charges $Q_1$ and $Q_2$ separated by $r$ is $25N$. It can be reduced to $5N$ if the separation between them is made
7. The SI unit of volume charge density is
8. The law regarding lectrostatic force between two point charges is
9. The value of the permitivity of free space ($\epsilon_0$) in SI units is
10. The charge on a body is always an integral multiple of a basic quantum of charge $(e)$. This propery of electric charge is called

 

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