In the circuit shown in the figure,R1 = 10 Ω,R2 = 12 Ω,R3 = 20 Ω,V1 = 1.0 V,V2 = 7.0 V,and the batteries are both ideal.What is the current through R1?

A) 0.60 A B) 0.80 A C) 0.18 A D) 0.13 A A) 0.60 A B) 0.80 A C) 0.18 A D) 0.13 A

In the circuit shown in the figure,R1 = R2 = 90.0 Ω,R3 = R4 = 20.0 Ω,V1 = 7.0 V,V2 = 8.0 V,and the batteries are both ideal.What current does the ammeter read?

A) 0.40 A B) 0.050 A C) 0.83 A D) 0.056 A A) 0.40 A B) 0.050 A C) 0.83 A D) 0.056 A

Exam 17: Dc Circuits

Four resistors are connected across an ideal dc source of V = 8.0 V,as shown in the figure.Assume all resistances shown are accurate to two significant figures.What is the current through the 9.0-Ω resistor?

(Multiple Choice)

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Question 141

Kirchhoff's junction rule is a statement of

(Multiple Choice)

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Question 142

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

(Multiple Choice)

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Question 143

Four resistors having resistances of 20 Ω,40 Ω,60 Ω,and 80 Ω are connected in series across an ideal dc voltage source.If the current through this circuit is 0.50 A,what is the voltage of the voltage source?

(Multiple Choice)

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Question 144

In the circuit shown in the figure,R₁ = 10 Ω,R₂ = 12 Ω,R₃ = 20 Ω,V₁ = 1.0 V,V₂ = 7.0 V,and the batteries are both ideal.What is the current through R₁?

(Multiple Choice)

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Question 145

What resistance must be connected in parallel with a 633-Ω resistor to produce an equivalent resistance of 205 Ω?

(Short Answer)

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Question 146

In the circuit shown in the figure,R₁ = R₂ = 90.0 Ω,R₃ = R₄ = 20.0 Ω,V₁ = 7.0 V,V₂ = 8.0 V,and the batteries are both ideal.What current does the ammeter read?

(Multiple Choice)

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Question 147

The figure shows a graph of the resistance of a wire as a function of its length.What physical quantities does the slope of this graph represent?

(Multiple Choice)

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Question 148

What is the resistance of a 0.100-kW light bulb designed to be used in a 120-V circuit dc?

(Multiple Choice)

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Question 149

The resistance of a 100-cm wire of cross sectional area 2 × $10^{ - 6}$ $m ^ { 2 }$ is 400 Ω.What is the resistivity of the material from which this wire is made?

(Multiple Choice)

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Question 150

A wire of resistivity ρ must be replaced in a circuit by a wire of the same material but four times as long.If,however,the total resistance is to remain as before,the diameter of the new wire must

(Multiple Choice)

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Question 151

What is the equivalent resistance between points A and B of the network shown in the figure?

(Short Answer)

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Question 152

The length of a certain wire is kept same while its radius is doubled.What is the new resistivity of this wire?

(Multiple Choice)

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Question 153

What is the voltage across a 5.0-Ω resistor if the current through it is 5.0 A?

(Multiple Choice)

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Question 154

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

(Multiple Choice)

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Question 155

If the voltage across a circuit of constant resistance is doubled,the power dissipated by that circuit will

(Multiple Choice)

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Question 156

Determine the current through the 8.0-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.

(Multiple Choice)

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Question 157

Consider two copper wires of equal cross-sectional area.One wire has 3 times the length of the other.How do the resistivities of these two wires compare?

(Multiple Choice)

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Question 158

A 400-W computer (including its monitor)is turned on for 8.0 hours per day.If electric energy costs 10¢ per kWh,how much does it cost to run the computer annually for a 365-day year?

(Multiple Choice)

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Question 159

If we double the resistance in a circuit but keep the current through it constant,the power dissipated by that circuit will

(Multiple Choice)

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Question 160

Showing 141 - 160 of 225

Exam 17: Dc Circuits

Four resistors are connected across an ideal dc source of V = 8.0 V,as shown in the figure.Assume all resistances shown are accurate to two significant figures.What is the current through the 9.0-Ω resistor?

Kirchhoff's junction rule is a statement of

If a quantity you calculated has units of kg⋅m2 s2⋅C\frac { \mathrm { kg } \cdot \mathrm { m } ^ { 2 } } { \mathrm {~s} ^ { 2 } \cdot \mathrm { C } } s2⋅Ckg⋅m2​ ,what is that quantity?

Four resistors having resistances of 20 Ω,40 Ω,60 Ω,and 80 Ω are connected in series across an ideal dc voltage source.If the current through this circuit is 0.50 A,what is the voltage of the voltage source?

In the circuit shown in the figure,R1 = 10 Ω,R2 = 12 Ω,R3 = 20 Ω,V1 = 1.0 V,V2 = 7.0 V,and the batteries are both ideal.What is the current through R1?

What resistance must be connected in parallel with a 633-Ω resistor to produce an equivalent resistance of 205 Ω?

In the circuit shown in the figure,R1 = R2 = 90.0 Ω,R3 = R4 = 20.0 Ω,V1 = 7.0 V,V2 = 8.0 V,and the batteries are both ideal.What current does the ammeter read?

The figure shows a graph of the resistance of a wire as a function of its length.What physical quantities does the slope of this graph represent?

What is the resistance of a 0.100-kW light bulb designed to be used in a 120-V circuit dc?

The resistance of a 100-cm wire of cross sectional area 2 × 10−610^{ - 6}10−6 m2m ^ { 2 }m2 is 400 Ω.What is the resistivity of the material from which this wire is made?

A wire of resistivity ρ must be replaced in a circuit by a wire of the same material but four times as long.If,however,the total resistance is to remain as before,the diameter of the new wire must

What is the equivalent resistance between points A and B of the network shown in the figure?

The length of a certain wire is kept same while its radius is doubled.What is the new resistivity of this wire?

What is the voltage across a 5.0-Ω resistor if the current through it is 5.0 A?

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

If the voltage across a circuit of constant resistance is doubled,the power dissipated by that circuit will

Determine the current through the 8.0-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.

Consider two copper wires of equal cross-sectional area.One wire has 3 times the length of the other.How do the resistivities of these two wires compare?

A 400-W computer (including its monitor)is turned on for 8.0 hours per day.If electric energy costs 10¢ per kWh,how much does it cost to run the computer annually for a 365-day year?

If we double the resistance in a circuit but keep the current through it constant,the power dissipated by that circuit will

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

In the circuit shown in the figure,R₁ = 10 Ω,R₂ = 12 Ω,R₃ = 20 Ω,V₁ = 1.0 V,V₂ = 7.0 V,and the batteries are both ideal.What is the current through R₁?

In the circuit shown in the figure,R₁ = R₂ = 90.0 Ω,R₃ = R₄ = 20.0 Ω,V₁ = 7.0 V,V₂ = 8.0 V,and the batteries are both ideal.What current does the ammeter read?

The resistance of a 100-cm wire of cross sectional area 2 × $10^{ - 6}$ $m ^ { 2 }$ is 400 Ω.What is the resistivity of the material from which this wire is made?