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PHY 112 MIDTERM EXAM |ACTUAL EXAM QUESTIONS
WITH ACCURATE ANSWERS | NEWEST 2025/2026
Two charged particles both have positive net charges. They are near each other and
released from rest. Which of the following statements best describes the interaction of the
particles? - ✓✓ ANSWER- The particles will repel. As they get further apart, the repelling
force will decrease
Which of the following statements concerning the structure of an atom is accurate? - ✓✓
ANSWER- Neutrally charged atoms contain equal amounts of protons and electrons
Three charged particles are held in place. Particle A has a net charge of +2 uC and is at (0,0)
m. Particle B has a net charge of +4uC and is placed a (0.5, 0) m. Particle C has a net
charge of -4 uC and is placed at (0, 0.5) m. What is the angle of direction of the net
forceacting on Particle A? - ✓✓ ANSWER- 135°
Two charged spheres are suspended from strings. The charged spheres repel each other.
Which statement correctly explains this behavior? - ✓✓ ANSWER- Both a and b are
possible
Three charged particles are held in place. Particle A has a net charge of +2 uC and is (0,0)
m. Particle B has a net charge of -4 uC and is placed at (0.5,0) m. Particle C has a net
charge of -4uC and is at (0, 0.5) m. What is the magnitude of the net force on particle A? -
✓✓ ANSWER- 0.41 N
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What is the net charge on an object that has gained 8E13 electrons? - ✓✓ ANSWER- -1.3E-5
C
Which of the following statements concerning charge is most accurate? - ✓✓ ANSWER-
The total charge present in the system and surroundings is constant in any process.
Charged particles A and B experience a static electric force of F. If the distance between
the charge particles triples, then the static electric force become - ✓✓ ANSWER- 1/9F
A positively charged plastic balloon filled with air will stick to a neutrally charged nonmetal
ceiling. Which for the following is the most likely explanation for this behavior? - ✓✓
ANSWER- The balloon caused the ceiling to polarize, which created a net attracting force
between the polarized ceiling and the balloon
Which of the following particles carries the positive type of charge? - ✓✓ ANSWER- Protons
Which of the following processes will NOT result in a change in net charge on an object? -
✓✓ ANSWER- Polarization
Which of the following statements regarding static electric charge is most accurate? - ✓✓
ANSWER- Force is proportional to the inverse square distance between the charged
particles.
PHY 112 MIDTERM EXAM |ACTUAL EXAM QUESTIONS
WITH ACCURATE ANSWERS | NEWEST 2025/2026
Two charged particles both have positive net charges. They are near each other and
released from rest. Which of the following statements best describes the interaction of the
particles? - ✓✓ ANSWER- The particles will repel. As they get further apart, the repelling
force will decrease
Which of the following statements concerning the structure of an atom is accurate? - ✓✓
ANSWER- Neutrally charged atoms contain equal amounts of protons and electrons
Three charged particles are held in place. Particle A has a net charge of +2 uC and is at (0,0)
m. Particle B has a net charge of +4uC and is placed a (0.5, 0) m. Particle C has a net
charge of -4 uC and is placed at (0, 0.5) m. What is the angle of direction of the net
forceacting on Particle A? - ✓✓ ANSWER- 135°
Two charged spheres are suspended from strings. The charged spheres repel each other.
Which statement correctly explains this behavior? - ✓✓ ANSWER- Both a and b are
possible
Three charged particles are held in place. Particle A has a net charge of +2 uC and is (0,0)
m. Particle B has a net charge of -4 uC and is placed at (0.5,0) m. Particle C has a net
charge of -4uC and is at (0, 0.5) m. What is the magnitude of the net force on particle A? -
✓✓ ANSWER- 0.41 N
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What is the net charge on an object that has gained 8E13 electrons? - ✓✓ ANSWER- -1.3E-5
C
Which of the following statements concerning charge is most accurate? - ✓✓ ANSWER-
The total charge present in the system and surroundings is constant in any process.
Charged particles A and B experience a static electric force of F. If the distance between
the charge particles triples, then the static electric force become - ✓✓ ANSWER- 1/9F
A positively charged plastic balloon filled with air will stick to a neutrally charged nonmetal
ceiling. Which for the following is the most likely explanation for this behavior? - ✓✓
ANSWER- The balloon caused the ceiling to polarize, which created a net attracting force
between the polarized ceiling and the balloon
Which of the following particles carries the positive type of charge? - ✓✓ ANSWER- Protons
Which of the following processes will NOT result in a change in net charge on an object? -
✓✓ ANSWER- Polarization
Which of the following statements regarding static electric charge is most accurate? - ✓✓
ANSWER- Force is proportional to the inverse square distance between the charged
particles.
