Question 1

You obtain a 100-W light bulb and a 50-W light bulb.Instead of connecting them in the normal way,you devise a circuit that places them in series across normal household voltage.If each one is an incandescent bulb of fixed resistance,which statement about these bulbs is correct?

Accepted Answer

A)  Both bulbs glow with the same brightness, but less than their normal brightness.
B)  Both bulbs glow with the same brightness, but more than their normal brightness.
C)  The 100-W bulb glows brighter than the 50-W bulb.
D)  The 50-W bulb glows more brightly than the 100-W bulb.

Question 2

A battery is rated such that it provides  1.0 mW1.0 \mathrm {~mW}1.0 mW  of power at  9.0 V9.0 \mathrm {~V}9.0 V  when fully charged.How much current can it deliver?

Accepted Answer

A)  0.11 mA
B)  81 kA
C)  0.33 mA
D)  9.1 kA

Question 3

A 12-V battery is connected across a 100-Ω resistor.How many electrons flow through the wire in 1.0 min? (e = 1.60 × 10-19 C)

Accepted Answer

A)  1.5 × 1019
B)  2.5 × 1019
C)  3.5 × 1019
D)  4.5 × 1019

Question 4

Draw a circuit with a battery connected to four resistors,R1,R2,R3,and R4,as follows.Resistors R1 and R2 are connected in parallel with each other,resistors R3 and R4 are connected in parallel with each other,and both parallel sets of resistors are connected in series with each other across the battery.

Accepted Answer

A)  1,R2,R3,and R4,as follows.Resistors R1 and R2 are connected in parallel with each other,resistors R3 and R4 are connected in parallel with each other,and both parallel sets of resistors are connected in series with each other across the battery.  
A)     
B)     
C)     
D)     " class="answers-bank-image d-inline" rel="preload" >
B)  1,R2,R3,and R4,as follows.Resistors R1 and R2 are connected in parallel with each other,resistors R3 and R4 are connected in parallel with each other,and both parallel sets of resistors are connected in series with each other across the battery.  
A)     
B)     
C)     
D)     " class="answers-bank-image d-inline" rel="preload" >
C)  1,R2,R3,and R4,as follows.Resistors R1 and R2 are connected in parallel with each other,resistors R3 and R4 are connected in parallel with each other,and both parallel sets of resistors are connected in series with each other across the battery.  
A)     
B)     
C)     
D)     " class="answers-bank-image d-inline" rel="preload" >
D)  1,R2,R3,and R4,as follows.Resistors R1 and R2 are connected in parallel with each other,resistors R3 and R4 are connected in parallel with each other,and both parallel sets of resistors are connected in series with each other across the battery.  
A)     
B)     
C)     
D)     " class="answers-bank-image d-inline" rel="preload" >

Question 5

A multiloop circuit is shown in the figure.Find the current I2 if the batteries are ideal.(It is not necessary to solve the entire circuit.)  2 if the batteries are ideal.(It is not necessary to solve the entire circuit.)    A) -3 A B) 3 A C) 7 A D) -7 A E) 0 A" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  -3 A
B)  3 A
C)  7 A
D)  -7 A
E)  0 A

Question 6

What is the current through a wire if 0.67 C of charge pass a point in the wire in 0.30 s?

Accepted Answer

A)  2.2 A
B)  0.67 A
C)  0.30 A
D)  0.20 A

Question 7

A 25-m wire of diameter 0.30 mm draws 0.499 A when connected across a 3.0-V potential difference.
(a)What is the resistance of the wire?
(b)What is the resistivity of the material from which the wire is made?

Accepted Answer

(a)6.0 Ω
...

Question 8

If the power rating of a 400-Ω resistor is 0.80 W,what is the maximum current it can safely draw?

Accepted Answer

A)  45 mA
B)  18 mA
C)  4.4 mA
D)  2.0 mA
E)  320 mA

Question 9

For the graph shown in the figure,what physical quantity does the slope of the graph represent for ohmic material?

Accepted Answer

A)  power
B)  resistivity
C)  1/(resistivity) 
D)  resistance
E)  1/(resistance)

Question 10

A 25-W soldering iron runs on 110 V dc.What is its resistance?

Accepted Answer

A)  0.0020 Ω
B)  4.4 Ω
C)  0.48 kΩ
D)  2.8 kΩ

Question 11

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

Accepted Answer

A)  The equivalent resistance is equal to that of any one of the resistors.
B)  The equivalent resistance is equal to average of the four resistances.
C)  The equivalent resistance is less than that of the smallest resistor.
D)  The equivalent resistance is less than that of the largest resistor.
E)  The equivalent resistance is more than the largest resistance.

Question 12

A 100-W light bulb is operated by a 110-V dc source.What is the resistance of this bulb?

Accepted Answer

A)  100 Ω
B)  8.0 × 10-3 Ω
C)  6.0 × 10-3 Ω
D)  120 Ω
E)  240 Ω

Question 13

A portion of a circuit is shown in the figure,and the batteries are ideal.What is the potential difference VA - VB if I = 5.0 A? A - VB if I = 5.0 A?   A) 63 V B) 35 V C) 55 V D) 45 V E) 71 V" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  63 V
B)  35 V
C)  55 V
D)  45 V
E)  71 V

Question 14

The graph shown in the figure shows the results of measurements of the dc current through a circuit device for various potential differences across it.Assume that all the numbers shown are accurate to two significant figures.What is the resistance of this device?

Accepted Answer

The answer of The graph shown in the figure shows...

Question 15

For the circuit shown in the figure,the ideal battery has an emf ε = 80 V.The four resistors have resistances of $R 1 = 14 \Omega$ $R _ { 2 } = 21 \Omega$ $R _ { 3 } = 21 \Omega$ and $R _ { 4 } = 14 \Omega$ Calculate the rate at which thermal energy is being generated in the resistor R4.

Accepted Answer

Question 16

If a quantity you calculated has units of  kg⋅m3 s⋅C2\frac { \mathrm { kg } \cdot \mathrm { m } ^ { 3 } } { \mathrm {~s} \cdot \mathrm { C } ^ { 2 } } s⋅C2kg⋅m3​  what is that quantity?

Accepted Answer

A)  potential
B)  resistivity
C)  resistance
D)  capacitance
E)  current

Question 17

If the current through R2  is 1.5 A ,what is the emf V of the ideal battery in the figure? 2  is 1.5 A ,what is the emf V of the ideal battery in the figure?   A) 150 V B) 75 V C) 60 V D) 30 V" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  150 V
B)  75 V
C)  60 V
D)  30 V

Question 18

Copper wire #1 has a length L and a radius b.Copper wire #2 has a length 2L and a radius 2b.Which statement about the resistance across the ends of the wires is true?

Accepted Answer

A)  The resistance of wire #1 is twice as high as that of wire #2.
B)  The resistance of wire #1 is equal to that of wire #2.
C)  The resistance of wire #1 is half that of wire #2.
D)  The resistance of wire #1 is four times higher than that of wire #2.

Question 19

Three resistors with resistances of 2.0 Ω,6.0 Ω,and 12 Ω are connected across an ideal dc voltage source V = 2.0 V,as shown in the figure.What is the total current I through this circuit?

Accepted Answer

A)  0.70 A
B)  1.5 A
C)  2.0 A
D)  3.0 A
E)  6.0 A

Question 20

Determine the current through the 4.0-Ω resistor for the circuit shown in the figure.Assume that the batteries are ideal and that all numbers are accurate to two significant figures.

Accepted Answer

A)  0.28 A
B)  1.3 A
C)  1.6 A
D)  2.1 A

Exam 17: Dc Circuits

A 25-m wire of diameter 0.30 mm draws 0.499 A when connected across a 3.0-V potential difference. (a)What is the resistance of the wire? (b)What is the resistivity of the material from which the wire is made?

Correct Answer
verified
(a)6.0 Ω
...
View Answer

A 100-W light bulb is operated by a 110-V dc source.What is the resistance of this bulb?

Correct Answer
verified

What is the current through a wire if 0.67 C of charge pass a point in the wire in 0.30 s?

Correct Answer
verified

Determine the current through the 4.0-Ω resistor for the circuit shown in the figure.Assume that the batteries are ideal and that all numbers are accurate to two significant figures.

Correct Answer
verified

A portion of a circuit is shown in the figure,and the batteries are ideal.What is the potential difference V_A- V_B if I = 5.0 A?

Correct Answer
verified

A multiloop circuit is shown in the figure.Find the current I₂if the batteries are ideal.(It is not necessary to solve the entire circuit.)

Correct Answer
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If the power rating of a 400-Ω resistor is 0.80 W,what is the maximum current it can safely draw?

Correct Answer
verified

A battery is rated such that it provides $1.0 \mathrm {~mW}$ of power at $9.0 \mathrm {~V}$ when fully charged.How much current can it deliver?

Correct Answer
verified

A 12-V battery is connected across a 100-Ω resistor.How many electrons flow through the wire in 1.0 min? (e = 1.60 × 10^-19 C)

Correct Answer
verified

A 25-W soldering iron runs on 110 V dc.What is its resistance?

Correct Answer
verified

Copper wire #1 has a length L and a radius b.Copper wire #2 has a length 2L and a radius 2b.Which statement about the resistance across the ends of the wires is true?

Correct Answer
verified

Correct Answer
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Correct Answer
verified

If a quantity you calculated has units of $\frac { \mathrm { kg } \cdot \mathrm { m } ^ { 3 } } { \mathrm {~s} \cdot \mathrm { C } ^ { 2 } }$ what is that quantity?

Correct Answer
verified

If the current through R₂ is 1.5 A ,what is the emf V of the ideal battery in the figure?

Correct Answer
verified

The graph shown in the figure shows the results of measurements of the dc current through a circuit device for various potential differences across it.Assume that all the numbers shown are accurate to two significant figures.What is the resistance of this device?

Correct Answer
verified

You obtain a 100-W light bulb and a 50-W light bulb.Instead of connecting them in the normal way,you devise a circuit that places them in series across normal household voltage.If each one is an incandescent bulb of fixed resistance,which statement about these bulbs is correct?

Correct Answer
verified

For the graph shown in the figure,what physical quantity does the slope of the graph represent for ohmic material?

Correct Answer
verified

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

Correct Answer
verified

Three resistors with resistances of 2.0 Ω,6.0 Ω,and 12 Ω are connected across an ideal dc voltage source V = 2.0 V,as shown in the figure.What is the total current I through this circuit?

Correct Answer
verified

Exam 17: Dc Circuits

A 25-m wire of diameter 0.30 mm draws 0.499 A when connected across a 3.0-V potential difference. (a)What is the resistance of the wire? (b)What is the resistivity of the material from which the wire is made?

Correct Answerverified(a)6.0 Ω ...View AnswerShow Answer

A 100-W light bulb is operated by a 110-V dc source.What is the resistance of this bulb?

Correct AnswerverifiedShow Answer

What is the current through a wire if 0.67 C of charge pass a point in the wire in 0.30 s?

Correct AnswerverifiedShow Answer

Determine the current through the 4.0-Ω resistor for the circuit shown in the figure.Assume that the batteries are ideal and that all numbers are accurate to two significant figures.

Correct AnswerverifiedShow Answer

A portion of a circuit is shown in the figure,and the batteries are ideal.What is the potential difference VA - VB if I = 5.0 A?

Correct AnswerverifiedShow Answer

A multiloop circuit is shown in the figure.Find the current I2 if the batteries are ideal.(It is not necessary to solve the entire circuit.)

Correct AnswerverifiedShow Answer

If the power rating of a 400-Ω resistor is 0.80 W,what is the maximum current it can safely draw?

Correct AnswerverifiedShow Answer

A battery is rated such that it provides 1.0 mW1.0 \mathrm {~mW}1.0 mW of power at 9.0 V9.0 \mathrm {~V}9.0 V when fully charged.How much current can it deliver?

Correct AnswerverifiedShow Answer

A 12-V battery is connected across a 100-Ω resistor.How many electrons flow through the wire in 1.0 min? (e = 1.60 × 10-19 C)

Correct AnswerverifiedShow Answer

A 25-W soldering iron runs on 110 V dc.What is its resistance?

Correct AnswerverifiedShow Answer

Copper wire #1 has a length L and a radius b.Copper wire #2 has a length 2L and a radius 2b.Which statement about the resistance across the ends of the wires is true?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

If a quantity you calculated has units of kg⋅m3 s⋅C2\frac { \mathrm { kg } \cdot \mathrm { m } ^ { 3 } } { \mathrm {~s} \cdot \mathrm { C } ^ { 2 } } s⋅C2kg⋅m3​ what is that quantity?

Correct AnswerverifiedShow Answer

If the current through R2 is 1.5 A ,what is the emf V of the ideal battery in the figure?

Correct AnswerverifiedShow Answer

The graph shown in the figure shows the results of measurements of the dc current through a circuit device for various potential differences across it.Assume that all the numbers shown are accurate to two significant figures.What is the resistance of this device?

Correct AnswerverifiedShow Answer

You obtain a 100-W light bulb and a 50-W light bulb.Instead of connecting them in the normal way,you devise a circuit that places them in series across normal household voltage.If each one is an incandescent bulb of fixed resistance,which statement about these bulbs is correct?

Correct AnswerverifiedShow Answer

For the graph shown in the figure,what physical quantity does the slope of the graph represent for ohmic material?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Three resistors with resistances of 2.0 Ω,6.0 Ω,and 12 Ω are connected across an ideal dc voltage source V = 2.0 V,as shown in the figure.What is the total current I through this circuit?

Correct AnswerverifiedShow Answer

Correct Answer
verified
(a)6.0 Ω
...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

A portion of a circuit is shown in the figure,and the batteries are ideal.What is the potential difference V_A- V_B if I = 5.0 A?

Correct Answer
verified

A multiloop circuit is shown in the figure.Find the current I₂if the batteries are ideal.(It is not necessary to solve the entire circuit.)

Correct Answer
verified

Correct Answer
verified

A battery is rated such that it provides $1.0 \mathrm {~mW}$ of power at $9.0 \mathrm {~V}$ when fully charged.How much current can it deliver?

Correct Answer
verified

A 12-V battery is connected across a 100-Ω resistor.How many electrons flow through the wire in 1.0 min? (e = 1.60 × 10^-19 C)

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
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Correct Answer
verified

If a quantity you calculated has units of $\frac { \mathrm { kg } \cdot \mathrm { m } ^ { 3 } } { \mathrm {~s} \cdot \mathrm { C } ^ { 2 } }$ what is that quantity?

Correct Answer
verified

If the current through R₂ is 1.5 A ,what is the emf V of the ideal battery in the figure?

Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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