If ε 1 = 4.0 V,ε 2 = 12.0 V,R1 = 4 Ω,R2 = 12 Ω,C = 3 μF,Q = 18 μC,and I = 2.5 A,what is the potential difference Va − Vb?

A) −30 V B) 30 V C) 5.0 V D) −5.0 V E) −1.0 V A) −30 V B) 30 V C) 5.0 V D) −5.0 V E) −1.0 V

If R1 = 3.0 Ω,R2 = 6.0 Ω,R3 = 12 Ω,and I = 0.50 A,at what rate is heat being generated in R1?

A) 20 W B) 17 W C) 12 W D) 31 W E) 6.0 W A) 20 W B) 17 W C) 12 W D) 31 W E) 6.0 W

Exam 28: Direct-Current Circuits

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The circuit below shows three resistors in series.R₃ > R₂ > R₁.The resistors are all made of the same wire with the same diameter but have different lengths.Rank the magnitudes of the electric fields in the resistors from least to greatest.

(Multiple Choice)

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Question 21

What is the equivalent resistance between points A and B in the figure when R = 20 Ω?

(Multiple Choice)

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Question 22

The circuit below contains three resistors,A,B,and C,which all have equal resistances.The emf ε = 110V.Which resistor generates the most thermal energy after the switch is closed?

(Multiple Choice)

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Question 23

What is the equivalent resistance between points A and B in the figure when R = 10 Ω?

(Multiple Choice)

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Question 24

Determine the resistance R when I = 1.5 A.

(Multiple Choice)

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Question 25

The circuit below shows three resistors in parallel.R₃ > R₂ > R₁.The resistors are all made of the same wire with the same diameter but have different lengths.Rank the magnitudes of the electric fields in the resistors from least to greatest.

(Multiple Choice)

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Question 26

When a 20-V emf is placed across two resistors in series,a current of 2.0 A is present in each of the resistors.When the same emf is placed across the same two resistors in parallel,the current through the emf is 10 A.What is the magnitude of the greater of the two resistances?

(Multiple Choice)

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Question 27

If Q = 400 μC and the potential difference V_A − V_B = −10 V in the circuit segment shown below,what is the current in the resistor?

(Multiple Choice)

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Question 28

An initially uncharged 10-μF capacitor is charged by a 10-V battery through a resistance R.The capacitor reaches a potential difference of 4 V in a period of 3 s after the charging began.Find the value of R.

(Short Answer)

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Question 29

If I = 0.40 A in the circuit segment shown below,what is the potential difference V_a − V_b?

(Multiple Choice)

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Question 30

If ε ₁ = 4.0 V,ε ₂ = 12.0 V,R₁ = 4 Ω,R₂ = 12 Ω,C = 3 μF,Q = 18 μC,and I = 2.5 A,what is the potential difference V_a − V_b?

(Multiple Choice)

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Question 31

If R = 4.0 kΩ,C = 3.0 mF,ε = 15 V,Q = 12 mC,and I = 2.0 mA,what is the potential difference V_b − V_a?

(Multiple Choice)

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Question 32

What is the current in the 15-Ω resistor when ε = 9.0 V?

(Multiple Choice)

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Question 33

If ε = 8.0 V,at what rate is that emf providing energy to the circuit shown below?

(Multiple Choice)

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Question 34

If R₁ = 3.0 Ω,R₂ = 6.0 Ω,R₃ = 12 Ω,and I = 0.50 A,at what rate is heat being generated in R₁?

(Multiple Choice)

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Question 35

The battery is disconnected from a series RC circuit after the capacitor is fully charged and is replaced by an open switch.When the switch is closed,

(Multiple Choice)

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Question 36

A battery has an internal resistance of 4.0 Ω.Which of the following load resistors would have the most power delivered to it when connected across the battery?

(Multiple Choice)

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Question 37

A circuit consists of N resistors,all of resistance R,connected as shown below.A potential difference V is applied to the circuit.The equivalent resistance of the circuit is

(Multiple Choice)

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Question 38

If R = 3.0 kΩ,C = 5.0 mF,ε = 6.0 V,Q = 15 mC,and I = 4.0 mA,what is the potential difference V_b − V_a?

(Multiple Choice)

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Question 39

What is the potential difference V_b − V_a shown in the circuit below.

(Multiple Choice)

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Question 40

Showing 21 - 40 of 84

Exam 28: Direct-Current Circuits

The circuit below shows three resistors in series.R3 > R2 > R1.The resistors are all made of the same wire with the same diameter but have different lengths.Rank the magnitudes of the electric fields in the resistors from least to greatest.

What is the equivalent resistance between points A and B in the figure when R = 20 Ω?

The circuit below contains three resistors,A,B,and C,which all have equal resistances.The emf ε = 110V.Which resistor generates the most thermal energy after the switch is closed?

What is the equivalent resistance between points A and B in the figure when R = 10 Ω?

Determine the resistance R when I = 1.5 A.

The circuit below shows three resistors in parallel.R3 > R2 > R1.The resistors are all made of the same wire with the same diameter but have different lengths.Rank the magnitudes of the electric fields in the resistors from least to greatest.

When a 20-V emf is placed across two resistors in series,a current of 2.0 A is present in each of the resistors.When the same emf is placed across the same two resistors in parallel,the current through the emf is 10 A.What is the magnitude of the greater of the two resistances?

If Q = 400 μC and the potential difference VA − VB = −10 V in the circuit segment shown below,what is the current in the resistor?

An initially uncharged 10-μF capacitor is charged by a 10-V battery through a resistance R.The capacitor reaches a potential difference of 4 V in a period of 3 s after the charging began.Find the value of R.

If I = 0.40 A in the circuit segment shown below,what is the potential difference Va − Vb?

If ε 1 = 4.0 V,ε 2 = 12.0 V,R1 = 4 Ω,R2 = 12 Ω,C = 3 μF,Q = 18 μC,and I = 2.5 A,what is the potential difference Va − Vb?

If R = 4.0 kΩ,C = 3.0 mF,ε = 15 V,Q = 12 mC,and I = 2.0 mA,what is the potential difference Vb − Va?

What is the current in the 15-Ω resistor when ε = 9.0 V?

If ε = 8.0 V,at what rate is that emf providing energy to the circuit shown below?

If R1 = 3.0 Ω,R2 = 6.0 Ω,R3 = 12 Ω,and I = 0.50 A,at what rate is heat being generated in R1?

The battery is disconnected from a series RC circuit after the capacitor is fully charged and is replaced by an open switch.When the switch is closed,

A battery has an internal resistance of 4.0 Ω.Which of the following load resistors would have the most power delivered to it when connected across the battery?

A circuit consists of N resistors,all of resistance R,connected as shown below.A potential difference V is applied to the circuit.The equivalent resistance of the circuit is

If R = 3.0 kΩ,C = 5.0 mF,ε = 6.0 V,Q = 15 mC,and I = 4.0 mA,what is the potential difference Vb − Va?

What is the potential difference Vb − Va shown in the circuit below.

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The circuit below shows three resistors in series.R₃ > R₂ > R₁.The resistors are all made of the same wire with the same diameter but have different lengths.Rank the magnitudes of the electric fields in the resistors from least to greatest.

The circuit below shows three resistors in parallel.R₃ > R₂ > R₁.The resistors are all made of the same wire with the same diameter but have different lengths.Rank the magnitudes of the electric fields in the resistors from least to greatest.

If Q = 400 μC and the potential difference V_A − V_B = −10 V in the circuit segment shown below,what is the current in the resistor?

If I = 0.40 A in the circuit segment shown below,what is the potential difference V_a − V_b?

If ε ₁ = 4.0 V,ε ₂ = 12.0 V,R₁ = 4 Ω,R₂ = 12 Ω,C = 3 μF,Q = 18 μC,and I = 2.5 A,what is the potential difference V_a − V_b?

If R = 4.0 kΩ,C = 3.0 mF,ε = 15 V,Q = 12 mC,and I = 2.0 mA,what is the potential difference V_b − V_a?

If R₁ = 3.0 Ω,R₂ = 6.0 Ω,R₃ = 12 Ω,and I = 0.50 A,at what rate is heat being generated in R₁?

If R = 3.0 kΩ,C = 5.0 mF,ε = 6.0 V,Q = 15 mC,and I = 4.0 mA,what is the potential difference V_b − V_a?

What is the potential difference V_b − V_a shown in the circuit below.