Ch31

1
Chapter 31
2
Conductors a to d are all made of the same
material. Rank in order, from largest to
smallest, the resistances Ra to Rd.
1. Ra gt Rc gt Rb gt Rd 2. Rb gt Rd gt Ra gt Rc 3.
Rc gt Ra gt Rd gt Rb 4. Rc gt Ra Rd gt Rb 5. Rd gt
Rb gt Rc gt Ra
3
Conductors a to d are all made of the same
material. Rank in order, from largest to
smallest, the resistances Ra to Rd.
1. Ra gt Rc gt Rb gt Rd 2. Rb gt Rd gt Ra gt Rc 3.
Rc gt Ra gt Rd gt Rb 4. Rc gt Ra Rd gt Rb 5. Rd gt
Rb gt Rc gt Ra
4
Which of these diagrams represent the same
circuit?
1. a and b 2. a and c 3. b and c 4. a, b, and
c 5. a, b, and d
5
Which of these diagrams represent the same
circuit?
1. a and b 2. a and c 3. b and c 4. a, b, and
c 5. a, b, and d
6
What is ?V across the unspecified circuit
element? Does the potential increase or decrease
when traveling through this element in the
direction assigned to I?
1. ?V increases by 2 V in the direction of I. 2.
?V decreases by 2 V in the direction of I. 3. ?V
increases by 10 V in the direction of I. 4. ?V
decreases by 10 V in the direction of I. 5. ?V
increases by 26 V in the direction of I.
7
What is ?V across the unspecified circuit
element? Does the potential increase or decrease
when traveling through this element in the
direction assigned to I?
1. ?V increases by 2 V in the direction of I. 2.
?V decreases by 2 V in the direction of I. 3. ?V
increases by 10 V in the direction of I. 4. ?V
decreases by 10 V in the direction of I. 5. ?V
increases by 26 V in the direction of I.
8
Rank in order, from largest to smallest, the
powers Pa to Pd dissipated in resistors a to d.

• 1. Pb gt Pa Pc Pd
• 2. Pb Pc gt Pa gt Pc
• 3. Pb Pd gt Pa gt Pc
• 4. Pb gt Pc gt Pa gt Pd
• 5. Pb gt Pd gt Pa gt Pc

9
Rank in order, from largest to smallest, the
powers Pa to Pd dissipated in resistors a to d.
1. Pb gt Pa Pc Pd 2. Pb Pc gt Pa gt Pc 3.
Pb Pd gt Pa gt Pc 4. Pb gt Pc gt Pa gt Pd 5. Pb
gt Pd gt Pa gt Pc
10
What is the potential at points a to e ?
1. 2. 3. 4. 5.
11
What is the potential at points a to e ?
1. 2. 3. 4. 5.
12
Rank in order, from brightest to dimmest, the
identical bulbs A to D.
1. A B C D 2. A gt B gt C D 3. A gt C gt B
gt D 4. A gt C D gt B 5. C D gt B gt A
13
Rank in order, from brightest to dimmest, the
identical bulbs A to D.
1. A B C D 2. A gt B gt C D 3. A gt C gt B
gt D 4. A gt C D gt B 5. C D gt B gt A
14
The time constant for the discharge of this
capacitor is
1. 1 s. 2. 2 s. 3. 4 s. 4. 5 s. 5. The
capacitor doesnt discharge because the resistors
cancel each other.
15
The time constant for the discharge of this
capacitor is
1. 1 s. 2. 2 s. 3. 4 s. 4. 5 s. 5. The
capacitor doesnt discharge because the resistors
cancel each other.
16
Chapter 31 Reading Quiz
17
How many laws are named after Kirchhoff?
1. 0 2. 1 3. 2 4. 3 5. 4
18
How many laws are named after Kirchhoff?
1. 0 2. 1 3. 2 4. 3 5. 4
19
What property of a real battery makes its
potential difference slightly different than that
of an ideal battery?
1. Short circuit 2. Chemical potential 3.
Internal resistance 4. Effective capacitance 5.
Inductive constant
20
What property of a real battery makes its
potential difference slightly different than that
of an ideal battery?
1. Short circuit 2. Chemical potential 3.
Internal resistance 4. Effective capacitance 5.
Inductive constant
21
In an RC circuit, what quantity is represented by
the symbol
1. Period 2. Torque 3. Terminal voltage 4.Time
constant 5. Coefficient of thermal expansion
22
In an RC circuit, what quantity is represented by
the symbol
1. Period 2. Torque 3. Terminal voltage 4. Time
constant 5. Coefficient of thermal expansion
23
Which of the following are ohmic materials
1. Wires 2. Resistors 3. Light bulb filaments 4.
All of the above 5. None of the above
24
Which of the following are ohmic materials
1. Wires 2. Resistors 3. Light bulb filaments 4.
All of the above 5. None of the above
25
The equivalent resistance for a group of parallel
resistors is
1. less than any resistor in the group. 2. equal
to the smallest resistance in the group. 3. equal
to the average resistance of the group. 4. equal
to the largest resistance in the group. 5. larger
than any resistor in the group.
26
The equivalent resistance for a group of parallel
resistors is
1. less than any resistor in the group. 2. equal
to the smallest resistance in the group. 3. equal
to the average resistance of the group. 4. equal
to the largest resistance in the group. 5. larger
than any resistor in the group.