Physics Principles and Problems 2009

Section 21.2 : Applications of Electric Fields

Self-Check Quizzes

1
The work done moving a positive test charge between two points in an electric field determines the _____.
A)electric field line
B)electric potential difference
C)voltage
D)force field
2
If the force exerted is in the same direction as the displacement, what can you say about the electric potential difference?
A)It cannot be determined.
B)It will be a positive value.
C)It cannot be measured in volts.
D)You cannot determine anything about it.
3
Which statement is true?
A)A test charge can only be positive.
B)Electric potential difference is the inverse of work needed to move a charge.
C)Electric potential is higher near a negatively charged plate.
D)There is not always an electric potential difference between two positions in an electric field.
4
What did Millikan use a uniform electric field between two parallel plates to measure?
A)charge of an electron
B)electric fields near conductors
C)the electric potential difference caused by X rays
D)the terminal velocity of a charged oil drop
5
What is the function of a capacitor?
A)to measure capacitance
B)to generate electric potential
C)to determine the charge on an object in a jar
D)to store charge
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