Welcome to the Quiz!
This quiz contains 14 questions from a mix of 1 subtopics.
What does electric potential (V) at a point in an electric field indicate?
the force needed to move a unit positive charge from infinity to that point
the work needed to move a unit positive charge from infinity to that point
the distance needed to move a unit positive charge from infinity to that point
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What happens to the potential energy of a positive charge as it approaches a positive source charge?
it increases
it becomes zero
it decreases
it remains constant
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What is the electric potential at infinity?
undefined
positive
negative
zero
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List three differences between gravitational and electric potential.
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What is electric potential (V) defined as?
the work needed to move a unit positive charge from one point to another
the work needed to move a unit negative charge from one point to another
the work needed to move a unit positive charge from infinity to a point
the work needed to move a unit negative charge from infinity to a point
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How does electric potential change as a positive charge approaches a positive source charge?
it increases
it fluctuates
it decreases
it remains constant
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Which of the following is a difference between gravitational and electric forces?
gravitational forces are always attractive, whereas electric forces can be either attractive or repulsive
all of the above
electric forces are influenced by the medium, unlike gravitational forces
electric fields can be shielded, but gravitational fields cannot
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What happens to the electric potential energy of a negative charge as it gets closer to a positive source charge?
it increases
it fluctuates
it remains constant
it decreases
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Describe the main differences between gravitational and electric potential.
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Explain the relationship between electric potential and electric potential energy.
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A point charge of 2 x 10-6 C is placed 10 m away from another point charge in a vacuum. Calculate the electric potential at the point where the second charge is located.
-2250 V
450 V
1798 V
-450 V
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Calculate the electric potential energy of a charge of 3 x 10-6 C located in an electric field with a potential of 100 V.
3 x 10-3 J
3 x 10-4 J
3 x 10-5 J
3 x 10-2 J
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If the distance between a point charge and a point in space is doubled, how does the electric potential at that point change, assuming all other factors remain constant?
it reduces to a quarter
it doubles
it quadruples
it halves
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A charge of -1 x 10-6 C is situated 2 m away from a point in a vacuum. What is the electric potential at this point?
2,250 V
1,125 V
-2,250 V
-4,496 V
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