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. 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
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. The charge on a body is always an integral multiple of a basic quantum of charge $(e)$. This propery of electric charge is called
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. The SI unit of volume charge density is
7. The dimension of electric flux is
8. The law regarding lectrostatic force between two point charges is
9. A proton at rest has charge $e$. When it moves with a high speed, its charge
10. The value of the permitivity of free space ($\epsilon_0$) in SI units is

 

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