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WorksheetsQuiz on Electric Charge, Force, Field and Flux
Total questions: 20
Worksheet time: 20mins
Two balls are attracting each other as they hang from the ceiling. What can you say about their charges?
both are negative
both are positive
one is positive, the other one is negative
either both are positive or both are negative
When a glass rod is rubbed with silk, which of the following statements best describes what happens?
electrons are removed from the rod
protons are removed from the silk
the silk is charged positively
the silk remains neutral
Which activity DOES NOT produce the same result as the other three?
walking across a woolen carpet
brushing dry hair with a plastic comb
sliding over a plastic-covers automobile seat
scraping food from a metal bowl with a metal spoon
When two dissimilar materials contact each other some of the electrons in one material will be drawn into the other material, this effect can be increased by rubbing the two surfaces together. What charging process is involved?
charging by friction
charging by conduction
charging by induction
charging by polarization
In which way is the electric force similar to the gravitational force?
Electric force is both attractive and repulsive.
Electric force is proportional to the mass of the object.
Electric force is similar in strength to gravitational force.
Electric force decreases in strength as the distance between the charges increases.
A negatively charged object is brought close to the surface of a conductor, whose opposite side is then grounded. What kind of charge is left on the conductor’s surface?
neutral
positive
negative
both positive and negative
When three charges exert forces simultaneously on the fourth charge, the net force acting on that charge is the vector sum of the forces that the three charges would exert individually. This principle is known as the _______________.
Coulomb’s Law
Gauss's Law
Superposition Principle of Forces
Superposition Principle of Electric Field
Which of the following provides a graphical representation of an electric field?
Cartesian plane
field lines
hyperbola
parabola
Which of the following would likely to happen to the electric field of force of an isolated negative charge?
It will move perpendicular.
It will move parallel.
It will move radially outward.
It will move radially inward.
If the distance between two point charges is tripled, the mutual force between them will be changed by what factor?
9
3
31
91
If the size of the charge value is tripled for both of two point charges maintained at a constant separation, the mutual force between them will be changed by what factor?
9
3
31
91
Q1 has 50 electric field lines radiating outward and Q2 has 100 field lines converging inward. What is the ratio Q1/Q2?
-2
−21
21
2
Charge A has 10 electric field lines coming out, Charge B has 20 lines coming out, and Charge C has 30 lines coming in. Which pair of these charges will have the largest force between them if placed one cm apart?
A and B
A and C
B and C
More information is needed.
Which of the following illustrates the number of electric field lines passing through a space or a region?
electric field direction
electric field strength
electric charge motion
electric charge density
The electric field of a point charge has an inverse _____ behavior.
r21
r
r2
r3
Which of the following is NOT TRUE about electric field lines?
Field lines point away from a positive charge.
Field lines point toward a negative charge.
Field lines are proportional to the magnitude of the charge.
Field lines from the same field can cross each other.
Which of the following is TRUE about electric charge?
It can be lost.
It can be destroyed.
It can be created from a chemical reaction.
It can be transferred from atom to atom.
An uncharged conductor is supported by an insulating stand. I pass a positively charged rod near the left end of the conductor, but do not touch it. The right end of the conductor will be _______________.
negative
neutral
positive
attracted
Which of the following measures the flow of the electric field through a surface?
Electric charge
Electric force
Electric flux
Electric potential
Which of the following best describes Gauss's Law?
A law that describes what an electric field will look like due to a known distribution of charge.
A law that describes what a magnetic field will look like due to a known distribution of charge.
A law that describes what an electric field will look like due to an unknown distribution of charge.
A law that describes what a magnetic field will look like due to an unknown distribution of charge.
