RIO SALADO PHY 112 MIDTERM EXAM| RIO
SALADO PHY 112 FINAL EXAM QUESTIONS
WITH CORRECT ANSWERS TESTED AND
APPROVED NEWLY MODIFIED
A positively charged plastic balloon filled with air will stick to a neutrally
charged nonmetal ceiling. Which of the following is the most likely explanation
for this behavior?
A) Some of the charge on the balloon transferred to the ceiling through
conduction.
B) The ceiling already had a net positive charge.
C) The ceiling already had a net negative charge.
D) The balloon caused the ceiling to polarize, which created a net attracting
force between the polarized ceiling and the balloon. --CORRECT ANSWER--
D) The balloon caused the ceiling to polarize, which created a net attracting
force between the polarized ceiling and the balloon.
Two charged particles each with a net charge of -q are a distance r apart. The
electric force F is measured. The distance between the particles then doubles to
2r, and the amount of charge on BOTH charges doubles to -2q. Relative to the
original force, what is the new electric force?
A) 1/2 F
B) 2 F
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,C) 4 F
D) F --CORRECT ANSWER--D) F
Particle A has a net charge of -5 μC. Particle B has a net charge of +10 μC.
Which of the following is the largest force?
A) The force of particle A on B
B) The force of particle B on A
C) They apply the same force on each other.
D) More information is needed (the distance between the particles needs to be
known). --CORRECT ANSWER--C) They apply the same force on each other.
Which of the following particles carries the positive type of charge?
A) Protons
B) Neutrons
C) Electrons
D) More than one of the above carry a positive type of charge. --CORRECT
ANSWER--A) Protons
Two positively charged particles experience a static electric force of F. One of
the particles is replaced with a new charged particle that has three times more
charge than the original. The new static electric force will be
A) F.
B) 3F
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,C) 1/3F
D) 9F --CORRECT ANSWER--B) 3F
Three charged particles are held in place. Particle A has a net charge of +2 μC
and is at (0, 0) m. Particle B has a net charge of -4 μC and is placed a (0.5, 0) m.
Particle C has a net charge of -4 μC and is at (0, 0.5) m. What is the magnitude
of the net force on particle A?
A) 0.41 N
B) 0.29 N
C) 0.58 N
D) 0.17 N --CORRECT ANSWER--A) 0.41 N
Which of the following statements regarding static electric charge is most
accurate?
A) Force is proportional to the distance between the charged particles.
B) Force is proportional the inverse distance between the charged particles.
C) Force is proportional to the inverse square distance between the charged
particles.
D) Force is proportional to the square of the distance between the charged
particles. --CORRECT ANSWER--C) Force is proportional to the inverse
square distance between the charged particles.
Two neutral metal blocks are in physical contact side-by-side. Block A is on the
left, and block B is on the right. A positively charged rod is near the left side of
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, block A (see below). With the positive rod still present, the blocks separate. As
a result, block B will have a net charge that is
A) positive.
B) negative
C) neutral
D)not enough information. --CORRECT ANSWER--A) positive
Three charged particles are held in place. Particle A has a net charge of +2 μC
and is at (0, 0) m. Particle B has a net charge of +4 μC and is placed a (0.5, 0)
m. Particle C has a net charge of -4 μC and is placed at (0, 0.5) m. What is the
angle of direction of the net force acting on particle A?
A) 45°
B) 135°
C) 225°
D) 315° --CORRECT ANSWER--B) 135°
Which of the following statements concerning the structure of an atom is
accurate?
A) Electrons orbit the nucleus exactly the same way that planets orbit the Sun.
B) Neutrally charged atoms contain equal amounts of protons and electrons.
C) The nucleus of an atom is composed of protons and electrons.
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SALADO PHY 112 FINAL EXAM QUESTIONS
WITH CORRECT ANSWERS TESTED AND
APPROVED NEWLY MODIFIED
A positively charged plastic balloon filled with air will stick to a neutrally
charged nonmetal ceiling. Which of the following is the most likely explanation
for this behavior?
A) Some of the charge on the balloon transferred to the ceiling through
conduction.
B) The ceiling already had a net positive charge.
C) The ceiling already had a net negative charge.
D) The balloon caused the ceiling to polarize, which created a net attracting
force between the polarized ceiling and the balloon. --CORRECT ANSWER--
D) The balloon caused the ceiling to polarize, which created a net attracting
force between the polarized ceiling and the balloon.
Two charged particles each with a net charge of -q are a distance r apart. The
electric force F is measured. The distance between the particles then doubles to
2r, and the amount of charge on BOTH charges doubles to -2q. Relative to the
original force, what is the new electric force?
A) 1/2 F
B) 2 F
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,C) 4 F
D) F --CORRECT ANSWER--D) F
Particle A has a net charge of -5 μC. Particle B has a net charge of +10 μC.
Which of the following is the largest force?
A) The force of particle A on B
B) The force of particle B on A
C) They apply the same force on each other.
D) More information is needed (the distance between the particles needs to be
known). --CORRECT ANSWER--C) They apply the same force on each other.
Which of the following particles carries the positive type of charge?
A) Protons
B) Neutrons
C) Electrons
D) More than one of the above carry a positive type of charge. --CORRECT
ANSWER--A) Protons
Two positively charged particles experience a static electric force of F. One of
the particles is replaced with a new charged particle that has three times more
charge than the original. The new static electric force will be
A) F.
B) 3F
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,C) 1/3F
D) 9F --CORRECT ANSWER--B) 3F
Three charged particles are held in place. Particle A has a net charge of +2 μC
and is at (0, 0) m. Particle B has a net charge of -4 μC and is placed a (0.5, 0) m.
Particle C has a net charge of -4 μC and is at (0, 0.5) m. What is the magnitude
of the net force on particle A?
A) 0.41 N
B) 0.29 N
C) 0.58 N
D) 0.17 N --CORRECT ANSWER--A) 0.41 N
Which of the following statements regarding static electric charge is most
accurate?
A) Force is proportional to the distance between the charged particles.
B) Force is proportional the inverse distance between the charged particles.
C) Force is proportional to the inverse square distance between the charged
particles.
D) Force is proportional to the square of the distance between the charged
particles. --CORRECT ANSWER--C) Force is proportional to the inverse
square distance between the charged particles.
Two neutral metal blocks are in physical contact side-by-side. Block A is on the
left, and block B is on the right. A positively charged rod is near the left side of
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, block A (see below). With the positive rod still present, the blocks separate. As
a result, block B will have a net charge that is
A) positive.
B) negative
C) neutral
D)not enough information. --CORRECT ANSWER--A) positive
Three charged particles are held in place. Particle A has a net charge of +2 μC
and is at (0, 0) m. Particle B has a net charge of +4 μC and is placed a (0.5, 0)
m. Particle C has a net charge of -4 μC and is placed at (0, 0.5) m. What is the
angle of direction of the net force acting on particle A?
A) 45°
B) 135°
C) 225°
D) 315° --CORRECT ANSWER--B) 135°
Which of the following statements concerning the structure of an atom is
accurate?
A) Electrons orbit the nucleus exactly the same way that planets orbit the Sun.
B) Neutrally charged atoms contain equal amounts of protons and electrons.
C) The nucleus of an atom is composed of protons and electrons.
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