22 Questions
What is the fundamental physical property that causes objects to feel attraction or repulsion towards one another?
Electric Charge
Which type of object has more protons than electrons?
Positively Charged Objects
According to the Law of Charges, what happens when like charges interact?
They repel each other
What type of materials permit electrons to flow freely from particle to particle?
Conductors
Which type of material allows charges to be transferred across the entire surface of the object?
Conducting material
If charge is transferred to an insulator at a given location, what happens to the excess charge?
It remains at the initial location of charging
Which of the following materials is NOT an example of a conductor?
Plastics
In charging by conduction, what does the process involve?
Contact of a charged object to a neutral object
What is the purpose of grounding a charged object?
To provide a path for excess charges to flow to the Earth
After rubbing a material with silk, what determines the charge of the material?
The material's ability to gain or lose electrons
According to the reflection section, what type of ion is formed if an atom has more negative charges than positive charges?
Negative ion
Where would you refer to determine the charge of objects after rubbing them together?
Scientific Reference Materials
What is the electric flux through a surface with an area of $6.2 \times 10^{-4} m^2$ when an electric field of $5.7 \times 10^{13} N/C$ makes an angle of 45 degrees with the surface vector?
$3.98 \times 10^{10}$ Nm²/C
When representing electric field lines, what do the pattern of lines point towards?
Direction that a positive test charge would accelerate
In Gauss's law, what does it mean when the net charge inside a closed surface is zero?
The electric flux through the surface is zero
What is the consequence of multiple charges contributing to the total electric field at a given point in space?
The individual fields due to each charge are added to get the total electric field
If a closed surface encloses a net charge of $8.0 \times 10^{-6} C$, and the permittivity of free space is $8.85 \times 10^{-12} C^2/Nm^2$, what is the electric flux through this surface?
$7.08 \times 10^{-6}$ Nm²/C
In the context of Gauss's Law, how is electric flux defined?
The product of electric field strength and the surface area of a closed surface
What is the formula to calculate the electric force between two point charges?
$F = k \frac{Q_1 Q_2}{d^2}$
In the context of electric charges, what does Gauss's Law state?
The net electric flux through a closed surface is equal to the total charge enclosed by that surface divided by the permittivity of free space.
What is the unit of Coulomb's constant, k, in the formula for electric force?
$Nm^2/C^2$
How does the principle of superposition apply to electrostatic forces?
It states that the net force on any one charge is the vector sum of forces due to all other charges present.
Test your knowledge of electric charge unit and electrostatics with this '4 Pics 1 Word' activity. Identify the word that comes to mind when you see the given pictures related to electric charge concepts.
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