Physics 112 Exam 2 Questions & Answers (Grade A+).docx

Physics 112 Exam 2 Questions &
Answers (Grade A+)
Suppose you have two capacitors and want to use them to store
the maximum amount of energy by connecting them across a
voltage source. You should connect them:


A) in a series across the source
B) in parallel across the source
C) it doesn't mater because the stored energy is the same either
way -
correct answer ✅B) in parallel across the source


Four unequal resistors are connected in parallel with each other.
Which one of the following statements is correct about this
combination?


A) The equivalent resistance is less than that of the smallest resistor
B) The equivalent resistance is equal to the average of the four
resistors
C) The equivalent resistance is midway between the largest and
smallest resistance
D) The equivalent resistance is more than the largest

, Physics 112 Exam 2 Questions &
Answers (Grade A+)
E) None of the choices are correct -
correct answer ✅A) The equivalent resistance is less than that of
the smallest resistor


Four resistors have resistances of 20, 40, 60, and 80 ohms, are
connected in series across as ideal dc voltage source. If the current
through this circuit is 0.50 A, what is the voltage across the voltage
source?


A) 20 V
B) 40 V
C) 60 V
D) 80 V
E) 100 V -
correct answer ✅E) 100 V


Three capacitors are connected as shown in the figure. What is the
equivalent capacitance between points A and B?


A) 12 uF
B) 4.0 uC