10 Questions
What does Coulomb's Law state?
The electro-static force is directly proportional to the product of charges and inversely proportional to the square of the distance between them.
What is the relative permittivity (εr) of a medium?
The ratio of its permittivity to the permittivity of free space.
What is the formula for the force on charge $q_1$ due to $q_2$ in vector form?
$\vec{F_{12}} = \frac{q_{1}q_{2}}{r^{2}}\hat{r_{21}}$
What is the value of K in Coulomb's Law in free space?
$9\times10^9 Nm^2C^{-2}$
What happens to the right-hand side of the vector form of Coulomb force if $q_1q_2>0$?
It is positive
What does Coulomb's Law state?
The electro-static force between two charged bodies is directly proportional to the product of their charges and varies inversely as the square of the distance between the two bodies.
What is the formula for the force between two charges in vector form?
$\vec{F_{12}} = \frac{q_{1}q_{2}}{r^{2}}\hat{r_{21}}$
What is the value of K in Coulomb's Law in free space?
$K = 9\times10^{9} Nm^{2}C^{-2}$
How is relative permittivity (εr) defined?
The ratio of the permittivity of a medium to the permittivity of free space.
If q1 and q2 have the same sign, what can be said about the right-hand side of the vector form of Coulomb force?
It is positive.
Test your knowledge of electrostatics and Coulomb's Law with this quiz. Challenge yourself with questions on the phenomena and properties of stationary electric charges, as well as the mathematical principles behind the electrostatic force of attraction or repulsion between charged bodies.
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