Physics 100B - General Physics II » Spring 2022 » Quiz 1

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Question #1
A small insulator has an total charge of -2.3 μC . It has
A.   1.4×1013 more protons than electrons.
B.   2.3×10−6 more protons than electrons.
C.   2.3×10−6 more electrons than protons.
D.   the same number of electrons and protons.
E.   1.4×1013 more electrons than protons.
Question #2
Two point charges are held 7 cm apart and experience a force of 1 N . After moving the charges so they are 5 times farther apart, the new force is
A.   5 N
B.   1/5 N
C.   1/25 N
D.   1 N
E.   25 N
Question #3
In a physics experiment, you isolate a nitrogen nucleus, with a charge of 7e, on the left and a carbon nucleus, with a charge of 6e, on the right. As a result,
A.   the electrical force on the nitrogen is to the right and the magnitude is equal to the force on carbon.
B.   the electrical force on the nitrogen is to the left and the magnitude is equal to the force on carbon.
C.   the electrical force on the nitrogen is to the right and the magnitude is larger than the force on carbon.
D.   the electrical force on the nitrogen is to the left and the magnitude is larger than the force on carbon.
E.   the electrical force on the nitrogen is to the right and the magnitude is smaller than the force on carbon.

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