Mastering Physics Set 2 Midterm #1 Exam Test with Answers Graded A+
1. A glass marble is rubbed against a piece The marble has lost the same number of elec-
of silk. As a result the piece of fabric ac- trons acquired by the piece of silk.
quires extra electrons. What happens to The marble acquires a positive charge and at-
the glass marble? tracts the piece of silk.
Check all that apply.
The marble has lost the same number of
electrons acquired by the piece of silk.
The marble has acquired the same num-
ber of electrons acquired by the piece of
silk.
The marble acquires a positive charge
and repels the piece of silk.
The marble acquires a positive charge
and attracts the piece of silk.
The marble acquires a negative charge
and attracts the piece of silk.
The marble acquires a negative charge
and repels the piece of silk.
2. has not been in contact with the piece of Marbles 1 and 2 repel each other, but no inter-
fabric, which of the following statements action occurs with marble 3.
best describes the situation when the
three marbles are brought together?
To keep things simple in this Tutorial, we
will ignore the effects of polarization and
just focus on the overall charge of each
object.
Marbles 1 and 2 attract each other, but
no interaction occurs with marble 3.
Both marbles 1 and 2 attract marble 3.
,Mastering Physics Set 2 Midterm #1 Exam Test with Answers Graded A+
The three marbles will repel each other.
Marbles 1 and 2 repel each other, but no
interaction occurs with marble 3.
3. strongly attractive (Figure 1) Consider three plastic balls (A, B, and
C), each carrying a uniformly distributed charge
equal to either +Q, -Q or zero, and an uncharged
copper ball (D). A positive test charge (T) ex-
periences the forces shown in the figure when
brought very near to the individual balls. The
test charge T is strongly attracted to A, strong-
ly repelled from B, weakly attracted to C, and
strongly attracted to D.
Assume throughout this problem that the balls
are brought very close together.
What is the nature of the force between balls A
and B?
strongly attractive
strongly repulsive
weakly attractive
neither attractive nor repulsive
4. weakly attractive (Figure 1) Consider three plastic balls (A, B, and
C), each carrying a uniformly distributed charge
equal to either +Q, -Q or zero, and an uncharged
copper ball (D). A positive test charge (T) ex-
, Mastering Physics Set 2 Midterm #1 Exam Test with Answers Graded A+
periences the forces shown in the figure when
brought very near to the individual balls. The
test charge T is strongly attracted to A, strong-
ly repelled from B, weakly attracted to C, and
strongly attracted to D.
Assume throughout this problem that the balls
are brought very close together.
What is the nature of the force between balls A
and C?
strongly attractive
strongly repulsive
weakly attractive
neither attractive nor repulsive
5. attractive (Figure 1) Consider three plastic balls (A, B, and
C), each carrying a uniformly distributed charge
equal to either +Q, -Q or zero, and an uncharged
copper ball (D). A positive test charge (T) ex-
periences the forces shown in the figure when
brought very near to the individual balls. The
test charge T is strongly attracted to A, strong-
ly repelled from B, weakly attracted to C, and
strongly attracted to D.
Assume throughout this problem that the balls
are brought very close together.
1. A glass marble is rubbed against a piece The marble has lost the same number of elec-
of silk. As a result the piece of fabric ac- trons acquired by the piece of silk.
quires extra electrons. What happens to The marble acquires a positive charge and at-
the glass marble? tracts the piece of silk.
Check all that apply.
The marble has lost the same number of
electrons acquired by the piece of silk.
The marble has acquired the same num-
ber of electrons acquired by the piece of
silk.
The marble acquires a positive charge
and repels the piece of silk.
The marble acquires a positive charge
and attracts the piece of silk.
The marble acquires a negative charge
and attracts the piece of silk.
The marble acquires a negative charge
and repels the piece of silk.
2. has not been in contact with the piece of Marbles 1 and 2 repel each other, but no inter-
fabric, which of the following statements action occurs with marble 3.
best describes the situation when the
three marbles are brought together?
To keep things simple in this Tutorial, we
will ignore the effects of polarization and
just focus on the overall charge of each
object.
Marbles 1 and 2 attract each other, but
no interaction occurs with marble 3.
Both marbles 1 and 2 attract marble 3.
,Mastering Physics Set 2 Midterm #1 Exam Test with Answers Graded A+
The three marbles will repel each other.
Marbles 1 and 2 repel each other, but no
interaction occurs with marble 3.
3. strongly attractive (Figure 1) Consider three plastic balls (A, B, and
C), each carrying a uniformly distributed charge
equal to either +Q, -Q or zero, and an uncharged
copper ball (D). A positive test charge (T) ex-
periences the forces shown in the figure when
brought very near to the individual balls. The
test charge T is strongly attracted to A, strong-
ly repelled from B, weakly attracted to C, and
strongly attracted to D.
Assume throughout this problem that the balls
are brought very close together.
What is the nature of the force between balls A
and B?
strongly attractive
strongly repulsive
weakly attractive
neither attractive nor repulsive
4. weakly attractive (Figure 1) Consider three plastic balls (A, B, and
C), each carrying a uniformly distributed charge
equal to either +Q, -Q or zero, and an uncharged
copper ball (D). A positive test charge (T) ex-
, Mastering Physics Set 2 Midterm #1 Exam Test with Answers Graded A+
periences the forces shown in the figure when
brought very near to the individual balls. The
test charge T is strongly attracted to A, strong-
ly repelled from B, weakly attracted to C, and
strongly attracted to D.
Assume throughout this problem that the balls
are brought very close together.
What is the nature of the force between balls A
and C?
strongly attractive
strongly repulsive
weakly attractive
neither attractive nor repulsive
5. attractive (Figure 1) Consider three plastic balls (A, B, and
C), each carrying a uniformly distributed charge
equal to either +Q, -Q or zero, and an uncharged
copper ball (D). A positive test charge (T) ex-
periences the forces shown in the figure when
brought very near to the individual balls. The
test charge T is strongly attracted to A, strong-
ly repelled from B, weakly attracted to C, and
strongly attracted to D.
Assume throughout this problem that the balls
are brought very close together.
