Question 1

When switch S is open, the ammeter in the circuit shown reads 2.0 A. When S is closed, the ammeter reading:

Accepted Answer

A)   increases slightly
B)   remains the same
C)   decreases slightly
D)   doubles
E)   halvesF) All of the above
G) A) and E)

Question 2

A battery with an emf of 12 V and an internal resistance of 1   Ω\OmegaΩ  is used to charge a battery with an emf of 10 V and an internal resistance of 1   Ω\OmegaΩ . The current in the circuit is:

Accepted Answer

A)   1 A
B)   2 A
C)   4 A
D)   11 A
E)   22 A F) A) and E)
G) B) and C)

Question 3

In the figure, voltmeter V1 reads 600 V, voltmeter V2 reads 580 V, and ammeter A reads 100 A. The power wasted in the transmission line connecting the power house to the consumer is: 1 reads 600 V, voltmeter V2 reads 580 V, and ammeter A reads 100 A. The power wasted in the transmission line connecting the power house to the consumer is:   A)  1 kW B)  2 kW C)  58 kW D)  59 kW E)  60 kW" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   1 kW
B)   2 kW
C)   58 kW
D)   59 kW
E)   60 kWF) A) and E)
G) A) and D)

Question 4

In the diagram R1 > R2 > R3. Rank the three resistors according to the current in them, least to greatest. 1 > R2 > R3. Rank the three resistors according to the current in them, least to greatest.   A)  1, 2, 3 B)  3, 2, 1 C)  1, 3, 2 D)  3, 1, 2 E)  All are the same" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   1, 2, 3
B)   3, 2, 1
C)   1, 3, 2
D)   3, 1, 2
E)   All are the sameF) B) and D)
G) A) and C)

Question 5

An ideal battery has an emf of 12 V. If it is connected to a circuit and creates a current of 4.0 A, what is the power?

Accepted Answer

A)   0.3 W
B)   3.0 W
C)   36 W
D)   48 W
E)   cannot tell without knowing the resistance of the circuitF) C) and D)
G) A) and B)

Question 6

In the circuit shown, both resistors have the same value R. Suppose switch S is initially closed and capacitor C is charged. When switch S is then opened, the circuit has a time constant   τ 	au τ a. Conversely, suppose S is initially open and capacitor C is uncharged. When switch S is then closed, the circuit has a time constant   τ 	au τ b. The ratio   τ 	au τ a/  τ 	au τ b is: a. Conversely, suppose S is initially open and capacitor C is uncharged. When switch S is then closed, the circuit has a time constant    	au  b. The ratio    	au  a/   	au  b is:   A)  0.5 B)  0.67 C)  1 D)  1.5 E)  2 " class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   0.5
B)   0.67
C)   1
D)   1.5
E)   2 F) A) and D)
G) D) and E)

Question 7

Each of the resistors in the diagram is 12   Ω\OmegaΩ . The resistance of the entire circuit is:

Accepted Answer

A)   5.8   Ω\OmegaΩ 
B)   25   Ω\OmegaΩ 
C)   48   Ω\OmegaΩ 
D)   120   Ω\OmegaΩ 
E)   none of these F) B) and C)
G) D) and E)

Question 8

Here is a loop equation: . What does this equation represent?

Accepted Answer

A)   a charging capacitor
B)   a discharging capacitor
C)   a capacitor that has been disconnected
D)   a charging resistor
E)   an oscillating circuitF) A) and C)
G) C) and D)

Question 9

Resistances of 2.0   Ω\OmegaΩ , 4.0   Ω\OmegaΩ , and 6.0   Ω\OmegaΩ  and a 24-V battery are all in series. The current in the 2.0   Ω\OmegaΩ  resistor is:

Accepted Answer

A)   12 A
B)   4.0 A
C)   2.4 A
D)   2.0 A
E)   0.50 A F) B) and E)
G) B) and C)

Question 10

A battery of emf 24 V is connected to a 6.0-  Ω\OmegaΩ  resistor. As a result, current of 3.0 A exists in the resistor. The rate at which energy is being dissipated in the battery is:

Accepted Answer

A)   3.0 W
B)   6.0 W
C)   18 W
D)   54 W
E)   72 W F) C) and D)
G) B) and D)

Question 11

In the circuit shown, the capacitor is initially uncharged, and V = 10 V. At time t = 0, switch S is closed. If   τ 	au τ denotes the time constant, the approximate current through the 3   Ω\OmegaΩ   resistor when t =   τ 	au τ /10 is:

Accepted Answer

A)   0.50 A
B)   0.75 A
C)   1.0 A
D)   1.5 A
E)   3.0 A F) C) and D)
G) D) and E)

Question 12

A total resistance of 3.0  ω \omega ω is to be produced by combining an unknown resistor R with a 12 ω \omega ω resistor. What is the value of R and how is it to be connected to the 12   Ω\OmegaΩ resistor?

Accepted Answer

A)   2.4   Ω\OmegaΩ , parallel
B)   2.4  Ω\OmegaΩ ) , series
C)   4.0   Ω\OmegaΩ , parallel
D)   4.0   Ω\OmegaΩ , series
E)   9.0  Ω\OmegaΩ  , series F) A) and D)
G) B) and E)

Question 13

Resistor 1 has twice the resistance of resistor 2. They are connected in parallel to a battery. The ratio of the thermal energy dissipation by 1 to that by 2 is:

Accepted Answer

A)   1:4
B)   1:2
C)   1:1
D)   2:1
E)   4:1F) B) and C)
G) A) and E)

Question 14

A certain capacitor, in series with a resistor, is being charged. At the end of 10 ms its charge is half the final value. The time constant for the process is about:

Accepted Answer

A)   5.0 ms
B)   6.9 ms
C)   10 ms
D)   14 ms
E)   20 msF) A) and B)
G) B) and E)

Question 15

Resistances of 2.0   Ω\OmegaΩ , 4.0   Ω\OmegaΩ , and 6.0   Ω\OmegaΩ  and a 24-V emf device are all in series. The circuit is initially ungrounded. After grounding, the current in the circuit:

Accepted Answer

A)   increases
B)   decreases
C)   does not change
D)   depends on where in the circuit the ground wire is attached
E)   depends on what the circuit is grounded to F) C) and D)
G) B) and C)

Question 16

In an antique automobile, a 6-V battery supplies a total of 48 W to two identical headlights in parallel. The resistance of each bulb is:

Accepted Answer

A)   0.75 Ω
B)   1.5 Ω
C)   3 Ω
D)   4 Ω
E)   8 ΩF) C) and D)
G) B) and D)

Question 17

A galvanometer has an internal resistance of 12   Ω\OmegaΩ   and requires 0.01 A for full scale deflection. To convert it to a voltmeter reading 3 V full scale, one must use a series resistance of:

Accepted Answer

A)   102   Ω\OmegaΩ  
B)   288   Ω\OmegaΩ  
C)   300   Ω\OmegaΩ  
D)   360   Ω\OmegaΩ  
E)   412   Ω\OmegaΩ   F) C) and E)
G) C) and D)

Question 18

In the diagrams, all light bulbs are identical and all emf devices are identical. In which circuit (I, II, III, IV, V)  will the bulbs be dimmest?

Accepted Answer

A)   I
B)   II
C)   III
D)   IV
E)   VF) B) and E)
G) All of the above

Question 19

Resistances of 2.0   Ω\OmegaΩ , 4.0   Ω\OmegaΩ  and 6.0   Ω\OmegaΩ  and a 24-V emf device are all in series. The potential difference across the 2.0-  Ω\OmegaΩ resistor is:

Accepted Answer

A)   4 V
B)   8 V
C)   12 V
D)   24 V
E)   48 V F) A) and B)
G) D) and E)

Question 20

If a circuit has L closed loops, B branches, and J junctions the number of independent loop equations is:

Accepted Answer

A)   B - J + 1
B)   B - J
C)   B
D)   L
E)   L - JF) A) and B)
G) B) and E)

Exam 27: Circuits

In the diagrams, all light bulbs are identical and all emf devices are identical. In which circuit (I, II, III, IV, V) will the bulbs be dimmest?

Correct Answer
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When switch S is open, the ammeter in the circuit shown reads 2.0 A. When S is closed, the ammeter reading:

Correct Answer
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Resistances of 2.0 $\Omega$ , 4.0 $\Omega$ , and 6.0 $\Omega$ and a 24-V emf device are all in series. The circuit is initially ungrounded. After grounding, the current in the circuit:

Correct Answer
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Here is a loop equation: . What does this equation represent?

Correct Answer
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Resistances of 2.0 $\Omega$ , 4.0 $\Omega$ and 6.0 $\Omega$ and a 24-V emf device are all in series. The potential difference across the 2.0- $\Omega$ resistor is:

Correct Answer
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A certain capacitor, in series with a resistor, is being charged. At the end of 10 ms its charge is half the final value. The time constant for the process is about:

Correct Answer
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Resistances of 2.0 $\Omega$ , 4.0 $\Omega$ , and 6.0 $\Omega$ and a 24-V battery are all in series. The current in the 2.0 $\Omega$ resistor is:

Correct Answer
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In the figure, voltmeter V₁ reads 600 V, voltmeter V₂ reads 580 V, and ammeter A reads 100 A. The power wasted in the transmission line connecting the power house to the consumer is:

Correct Answer
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In an antique automobile, a 6-V battery supplies a total of 48 W to two identical headlights in parallel. The resistance of each bulb is:

Correct Answer
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Correct Answer
verified

A battery with an emf of 12 V and an internal resistance of 1 $\Omega$ is used to charge a battery with an emf of 10 V and an internal resistance of 1 $\Omega$ . The current in the circuit is:

Correct Answer
verified

A galvanometer has an internal resistance of 12 $\Omega$ and requires 0.01 A for full scale deflection. To convert it to a voltmeter reading 3 V full scale, one must use a series resistance of:

Correct Answer
verified

If a circuit has L closed loops, B branches, and J junctions the number of independent loop equations is:

Correct Answer
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A total resistance of 3.0 $\omega$ is to be produced by combining an unknown resistor R with a 12 $\omega$ resistor. What is the value of R and how is it to be connected to the 12 $\Omega$ resistor?

Correct Answer
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In the diagram R₁ > R₂ > R₃. Rank the three resistors according to the current in them, least to greatest.

Correct Answer
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Each of the resistors in the diagram is 12 $\Omega$ . The resistance of the entire circuit is: $Each of the resistors in the diagram is 12 \Omega . The resistance of the entire circuit is: A) 5.8 \Omega B) 25 \Omega C) 48 \Omega D) 120 \Omega E) none of these$

Correct Answer
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Resistor 1 has twice the resistance of resistor 2. They are connected in parallel to a battery. The ratio of the thermal energy dissipation by 1 to that by 2 is:

Correct Answer
verified

A battery of emf 24 V is connected to a 6.0- $\Omega$ resistor. As a result, current of 3.0 A exists in the resistor. The rate at which energy is being dissipated in the battery is:

Correct Answer
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An ideal battery has an emf of 12 V. If it is connected to a circuit and creates a current of 4.0 A, what is the power?

Correct Answer
verified

Correct Answer
verified

Exam 27: Circuits

In the diagrams, all light bulbs are identical and all emf devices are identical. In which circuit (I, II, III, IV, V) will the bulbs be dimmest?

Correct AnswerverifiedShow Answer

When switch S is open, the ammeter in the circuit shown reads 2.0 A. When S is closed, the ammeter reading:

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Resistances of 2.0 Ω\OmegaΩ , 4.0 Ω\OmegaΩ , and 6.0 Ω\OmegaΩ and a 24-V emf device are all in series. The circuit is initially ungrounded. After grounding, the current in the circuit:

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Here is a loop equation: . What does this equation represent?

Correct AnswerverifiedShow Answer

Resistances of 2.0 Ω\OmegaΩ , 4.0 Ω\OmegaΩ and 6.0 Ω\OmegaΩ and a 24-V emf device are all in series. The potential difference across the 2.0- Ω\OmegaΩ resistor is:

Correct AnswerverifiedShow Answer

A certain capacitor, in series with a resistor, is being charged. At the end of 10 ms its charge is half the final value. The time constant for the process is about:

Correct AnswerverifiedShow Answer

Resistances of 2.0 Ω\OmegaΩ , 4.0 Ω\OmegaΩ , and 6.0 Ω\OmegaΩ and a 24-V battery are all in series. The current in the 2.0 Ω\OmegaΩ resistor is:

Correct AnswerverifiedShow Answer

In the figure, voltmeter V1 reads 600 V, voltmeter V2 reads 580 V, and ammeter A reads 100 A. The power wasted in the transmission line connecting the power house to the consumer is:

Correct AnswerverifiedShow Answer

In an antique automobile, a 6-V battery supplies a total of 48 W to two identical headlights in parallel. The resistance of each bulb is:

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

A battery with an emf of 12 V and an internal resistance of 1 Ω\OmegaΩ is used to charge a battery with an emf of 10 V and an internal resistance of 1 Ω\OmegaΩ . The current in the circuit is:

Correct AnswerverifiedShow Answer

A galvanometer has an internal resistance of 12 Ω\OmegaΩ and requires 0.01 A for full scale deflection. To convert it to a voltmeter reading 3 V full scale, one must use a series resistance of:

Correct AnswerverifiedShow Answer

If a circuit has L closed loops, B branches, and J junctions the number of independent loop equations is:

Correct AnswerverifiedShow Answer

A total resistance of 3.0 ω \omega ω is to be produced by combining an unknown resistor R with a 12 ω \omega ω resistor. What is the value of R and how is it to be connected to the 12 Ω\OmegaΩ resistor?

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In the diagram R1 > R2 > R3. Rank the three resistors according to the current in them, least to greatest.

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Each of the resistors in the diagram is 12 Ω\OmegaΩ . The resistance of the entire circuit is:

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Resistor 1 has twice the resistance of resistor 2. They are connected in parallel to a battery. The ratio of the thermal energy dissipation by 1 to that by 2 is:

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A battery of emf 24 V is connected to a 6.0- Ω\OmegaΩ resistor. As a result, current of 3.0 A exists in the resistor. The rate at which energy is being dissipated in the battery is:

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An ideal battery has an emf of 12 V. If it is connected to a circuit and creates a current of 4.0 A, what is the power?

Correct AnswerverifiedShow Answer

In the circuit shown, the capacitor is initially uncharged, and V = 10 V. At time t = 0, switch S is closed. If τ \tau τ denotes the time constant, the approximate current through the 3 Ω\OmegaΩ resistor when t = τ \tau τ /10 is:

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
verified

Resistances of 2.0 $\Omega$ , 4.0 $\Omega$ , and 6.0 $\Omega$ and a 24-V emf device are all in series. The circuit is initially ungrounded. After grounding, the current in the circuit:

Correct Answer
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Correct Answer
verified

Resistances of 2.0 $\Omega$ , 4.0 $\Omega$ and 6.0 $\Omega$ and a 24-V emf device are all in series. The potential difference across the 2.0- $\Omega$ resistor is:

Correct Answer
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Correct Answer
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Resistances of 2.0 $\Omega$ , 4.0 $\Omega$ , and 6.0 $\Omega$ and a 24-V battery are all in series. The current in the 2.0 $\Omega$ resistor is:

Correct Answer
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In the figure, voltmeter V₁ reads 600 V, voltmeter V₂ reads 580 V, and ammeter A reads 100 A. The power wasted in the transmission line connecting the power house to the consumer is:

Correct Answer
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Correct Answer
verified

Correct Answer
verified

A battery with an emf of 12 V and an internal resistance of 1 $\Omega$ is used to charge a battery with an emf of 10 V and an internal resistance of 1 $\Omega$ . The current in the circuit is:

Correct Answer
verified

A galvanometer has an internal resistance of 12 $\Omega$ and requires 0.01 A for full scale deflection. To convert it to a voltmeter reading 3 V full scale, one must use a series resistance of:

Correct Answer
verified

Correct Answer
verified

A total resistance of 3.0 $\omega$ is to be produced by combining an unknown resistor R with a 12 $\omega$ resistor. What is the value of R and how is it to be connected to the 12 $\Omega$ resistor?

Correct Answer
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In the diagram R₁ > R₂ > R₃. Rank the three resistors according to the current in them, least to greatest.

Correct Answer
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Each of the resistors in the diagram is 12 $\Omega$ . The resistance of the entire circuit is: $Each of the resistors in the diagram is 12 \Omega . The resistance of the entire circuit is: A) 5.8 \Omega B) 25 \Omega C) 48 \Omega D) 120 \Omega E) none of these$

Correct Answer
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Correct Answer
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A battery of emf 24 V is connected to a 6.0- $\Omega$ resistor. As a result, current of 3.0 A exists in the resistor. The rate at which energy is being dissipated in the battery is:

Correct Answer
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Correct Answer
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Correct Answer
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