PHYSICS 112 EXAM 2 MULTIPLE CHOICE QUESTIONS
AND VERIFIED ANSWERS
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 - Answers - 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
E) None of the choices are correct - Answers - 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 - Answers - 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
C) 7.1 uF
D) 1.7 uF
E) 8.0 uF - Answers - D) 1.7 uF
Kirchoff's junction rule is a statement of
A) the law of conservation of momentum
AND VERIFIED ANSWERS
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 - Answers - 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
E) None of the choices are correct - Answers - 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 - Answers - 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
C) 7.1 uF
D) 1.7 uF
E) 8.0 uF - Answers - D) 1.7 uF
Kirchoff's junction rule is a statement of
A) the law of conservation of momentum
