PHY 112 - RIO SALADO EXAM
QUESTIONS AND ANSWERS WITH
VERIFIED ANSWERS 2025/2026
, 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 - 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. -
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 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. - 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° - 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.
D)None of the above statements are accurate. - ANSWER-B) Neutrally charged atoms
contain equal amounts of protons and electrons.
QUESTIONS AND ANSWERS WITH
VERIFIED ANSWERS 2025/2026
, 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 - 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. -
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 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. - 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° - 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.
D)None of the above statements are accurate. - ANSWER-B) Neutrally charged atoms
contain equal amounts of protons and electrons.
