Exam 1 – PHYS 112
1:00 – 1:50 PM
February 20, 2026
Test Instruction
• Calculator is allowed.
• One 3×5 inch index card is allowed with anything written on both sides.
• Only the Akindi (bubble) sheet will be collected and graded. Make sure you
bubble your answers on the Akindi sheet correctly.
• You can write on this test, but it will not be graded.
• Do NOT open this test until you are told so.
• No books, notes, headphones, earbuds, electronic devices, caps with bills, or
sunglasses.
• Standards for academic integrity will be enforced.
• All incidents of alleged academic misconduct will be reported.
Stay calm and do your best!
1
, Q1. Two objects A and B are electrically attracted to each other. Which of the following is possible?
Select all apply.
A. both objects are neutral
B. both objects are positively charged.
C. both objects are negatively charged.
D. one object is positively charged, and the other object is neutral.
JEF8 E. one object is negatively charged, and the other object is neutral.
F. one object is positively charged, and the other object is negatively charged.
Q2. A positively charged rod close to the top of the electroscope, but not touching.
How will the leaves respond?
A. The leaves spread further apart.
A0 B. The leaves move closer together.
C. The leaves do not change their position.
Q3. A plastic rod that has been charged to 40 nC touches a neutral metal sphere. Afterward, the rod's
charge is 15 nC. How much charge on the metal sphere?
A. 55 nC
B. 25 nC
C. -55 nC
D. -25 nC
E. None of the above
Q4. Three point-charges are shown below. q1 = 4.0 μC, q2 = 6.0 μC, and q3 = -2.0 μC.
d1 = 5.00 cm and d2 = 3.00 cm. 1.00 μC = 1.00×10-6 C, 1.00 cm=1.00×10-2 m. Use K = 9.00×109 N·m2/C2.
What is the net electric force on q1?
A. 98 N, to the right
B. 98 N, to the left
C. 166 N, to the right
D. 166 N, to the left
E. 6.4 N, to the right
F. 6.4 N, to the left
G. 75 N, to the right
0H. 75 N, to the left
I. None of the above
2
1:00 – 1:50 PM
February 20, 2026
Test Instruction
• Calculator is allowed.
• One 3×5 inch index card is allowed with anything written on both sides.
• Only the Akindi (bubble) sheet will be collected and graded. Make sure you
bubble your answers on the Akindi sheet correctly.
• You can write on this test, but it will not be graded.
• Do NOT open this test until you are told so.
• No books, notes, headphones, earbuds, electronic devices, caps with bills, or
sunglasses.
• Standards for academic integrity will be enforced.
• All incidents of alleged academic misconduct will be reported.
Stay calm and do your best!
1
, Q1. Two objects A and B are electrically attracted to each other. Which of the following is possible?
Select all apply.
A. both objects are neutral
B. both objects are positively charged.
C. both objects are negatively charged.
D. one object is positively charged, and the other object is neutral.
JEF8 E. one object is negatively charged, and the other object is neutral.
F. one object is positively charged, and the other object is negatively charged.
Q2. A positively charged rod close to the top of the electroscope, but not touching.
How will the leaves respond?
A. The leaves spread further apart.
A0 B. The leaves move closer together.
C. The leaves do not change their position.
Q3. A plastic rod that has been charged to 40 nC touches a neutral metal sphere. Afterward, the rod's
charge is 15 nC. How much charge on the metal sphere?
A. 55 nC
B. 25 nC
C. -55 nC
D. -25 nC
E. None of the above
Q4. Three point-charges are shown below. q1 = 4.0 μC, q2 = 6.0 μC, and q3 = -2.0 μC.
d1 = 5.00 cm and d2 = 3.00 cm. 1.00 μC = 1.00×10-6 C, 1.00 cm=1.00×10-2 m. Use K = 9.00×109 N·m2/C2.
What is the net electric force on q1?
A. 98 N, to the right
B. 98 N, to the left
C. 166 N, to the right
D. 166 N, to the left
E. 6.4 N, to the right
F. 6.4 N, to the left
G. 75 N, to the right
0H. 75 N, to the left
I. None of the above
2
