16 Questions
Which material was known to attract lightweight particles after rubbing and led to the word 'electricity'?
Amber
What is the branch of physics that studies slow-moving or stationary electric charges?
Electrostatics
What law describes the forces that electric charges exert on each other?
Coulomb's Law
What phenomenon describes the attraction of plastic wrap to one's hand after it is removed from a package?
Electrostatic phenomenon
At what scale do electrostatic forces play a large role?
Nanoscale
What is the SI unit of vacuum permittivity, ε0?
C2⋅N−1⋅m−2
What force between an electron and a proton is more than 39 orders of magnitude stronger than the gravitational force acting between them?
Coulomb force
What is the value of the Coulomb constant, ke?
8.987551792 × 109 N⋅m2⋅C−2
What defines the electrostatic force F on a hypothetical small test charge due to Coulomb's Law?
Electric field, E
What type of force exists between two point charges with the same sign?
Electrostatic repulsive
What is the magnitude of the electric field at any given point represented by?
Density of electric field lines
What does the electric field, E, represent?
Force on a hypothetical small test charge at the point due to Coulomb's Law
What does the Coulomb's law state about the electrostatic force between two point charges with different signs?
- It is attractive
What happens to the electric field lines at the location of point charges?
They diverge to infinity
What does ε0 represent in Coulomb's law?
Permittivity of free space
What are the SI units of ε0?
C2⋅N−1⋅m−2
This quiz provides an introduction to the branch of physics known as electrostatics, which deals with stationary electric charges and the forces they exert on each other. It covers the historical background, key concepts such as electric attraction, and the application of Coulomb's law.
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