PHY 112 QUIZZES QUESTIONS AND VERIFIED
ANSWERS
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 - Answers - 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. -
Answers - 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 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. - Answers - 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° - Answers - 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.
, D)None of the above statements are accurate. - Answers - B) Neutrally charged atoms
contain equal amounts of protons and electrons.
The property of matter that is responsible for static electric effects is
A) charge.
B) mass.
C) momentum.
D) density. - Answers - A) charge
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. - Answers - 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
C) 4 F
D) F - Answers - 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).
- Answers - 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. - Answers - 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.
ANSWERS
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 - Answers - 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. -
Answers - 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 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. - Answers - 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° - Answers - 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.
, D)None of the above statements are accurate. - Answers - B) Neutrally charged atoms
contain equal amounts of protons and electrons.
The property of matter that is responsible for static electric effects is
A) charge.
B) mass.
C) momentum.
D) density. - Answers - A) charge
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. - Answers - 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
C) 4 F
D) F - Answers - 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).
- Answers - 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. - Answers - 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.
