10 Questions
What does Equation (1.3) in the text represent?
The electrostatic force between two point charges
What is the relationship between the forces F12 and F21 according to Coulomb's law?
F12 = -F21
Which law does Coulomb's law agree with according to the text?
Newton's third law
What kind of dependence on distance do both Coulomb's law and Newton's law exhibit?
Inverse-square dependence
What is the electric force between an electron and a proton at a distance r apart?
$\frac{1}{4 \pi \varepsilon_0} \cdot \frac{e^2}{r^2}$
What is the corresponding gravitational force between an electron and a proton at a distance r apart?
$-Gm_em_p/r^2$
What does the negative sign in the electric force equation between an electron and a proton indicate?
The force has an attractive nature
How does Coulomb's law compare with Gauss's law in terms of describing electric fields?
Coulomb's law applies only to point charges, while Gauss's law applies to any charge distribution.
What does the inverse-square dependence on distance signify in both Coulomb's and Newton's laws?
$F$ decreases with the square of the distance from the source of the field.
What are the masses of a proton and an electron as provided in the text?
$9.11 \times 10^{-31}$ kg and $1.67 \times 10^{-27}$ kg respectively
Test your knowledge about Coulomb's law, a quantitative statement about the force between two point charges. Learn about how the force varies inversely as the square of the distance between charges and its direct proportionality to the product of the charges.
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