The resistivity of a 1.0 m long copper wire is 1.72 × 10-8 Ω ∙ m and its cross sectional area is 2.0 × 10-6 m2. If the wire carries a current of 0.20 A, what is the voltage across the wire?

A) 17 mV B) 0.90 mV C) 1.7 mV D) 10 mV E) 90 mV A) 17 mV B) 0.90 mV C) 1.7 mV D) 10 mV E) 90 mV

Exam 22: Current and Resistance

How much current will be flowing through a $57.0 - \mathrm { m }$ length of copper wire with radius $0.0 \mathrm {~mm}$ if it is connected to a source supplying $62.0 \mathrm {~V} ?$ The resistivity of the metal is 1.68 × 10^-8 ? ? m.

(Multiple Choice)

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Question 41

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 42

A 4000-Ω resistor is connected across a 220-V power source. What current will flow through the resistor?

(Multiple Choice)

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Question 43

A tube of mercury with resistivity 9.84 × 10^-7 Ω ∙ m has a uniform electric field of 23 N/C inside the mercury. How much current is flowing in the tube, if the radius of the tube is 0.495 mm?

(Multiple Choice)

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Question 44

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

(Multiple Choice)

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Question 45

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 46

The resistivity of a 1.0 m long copper wire is 1.72 × 10^-8 Ω ∙ m and its cross sectional area is 2.0 × 10^-6 m². If the wire carries a current of 0.20 A, what is the voltage across the wire?

(Multiple Choice)

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Question 47

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 48

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

(Multiple Choice)

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Question 49

A flashlight draws 0.133 A from a 3.0-V battery pack. In 2.0 minutes (a)how much charge flows from the battery, (b)how much energy does the battery supply, and (c)how many electrons have passed any point in the circuit every second?

(Short Answer)

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Question 50

If the power rating of a 400-Ω resistor is 0.800 W, what is the maximum voltage that can safely be connected across the resistor?

(Multiple Choice)

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Question 51

A simple circuit has a total resistance of 30 Ω. If a 2.0-A current is maintained in this circuit, how much energy is dissipated in this circuit in 4.0 seconds?

(Multiple Choice)

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Question 52

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

(Multiple Choice)

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Question 53

A resistor operated at 120 V dc is rated at 1.40 kW. (a)What is the normal operating current through the resistor? (b)What is the resistance of the resistor?

(Short Answer)

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Question 54

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 55

A 200-Ω resistor is rated at 1/4 W. What is the maximum voltage that can safely be connected across it?

(Multiple Choice)

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Question 56

What potential difference is required to cause 4.00 A to flow through a resistance of 330 Ω?

(Multiple Choice)

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Question 57

A 120-m long metal wire having a resistivity of 1.68 × 10^-8 Ω ∙ m has a resistance of 6.0 Ω. What is the diameter of the wire?

(Multiple Choice)

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Question 58

A toaster is rated at 800 W when operating at 120 V dc. What is the resistance of its heating element?

(Multiple Choice)

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Question 59

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

(Multiple Choice)

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Question 60

Showing 41 - 60 of 124

Exam 22: Current and Resistance

How much current will be flowing through a 57.0−m57.0 - \mathrm { m }57.0−m length of copper wire with radius 0.0 mm0.0 \mathrm {~mm}0.0 mm if it is connected to a source supplying 62.0 V?62.0 \mathrm {~V} ?62.0 V? The resistivity of the metal is 1.68 × 10-8 ? ? m.

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

A 4000-Ω resistor is connected across a 220-V power source. What current will flow through the resistor?

A tube of mercury with resistivity 9.84 × 10-7 Ω ∙ m has a uniform electric field of 23 N/C inside the mercury. How much current is flowing in the tube, if the radius of the tube is 0.495 mm?

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

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

The resistivity of a 1.0 m long copper wire is 1.72 × 10-8 Ω ∙ m and its cross sectional area is 2.0 × 10-6 m2. If the wire carries a current of 0.20 A, what is the voltage across the wire?

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?

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

A flashlight draws 0.133 A from a 3.0-V battery pack. In 2.0 minutes (a)how much charge flows from the battery, (b)how much energy does the battery supply, and (c)how many electrons have passed any point in the circuit every second?

If the power rating of a 400-Ω resistor is 0.800 W, what is the maximum voltage that can safely be connected across the resistor?

A simple circuit has a total resistance of 30 Ω. If a 2.0-A current is maintained in this circuit, how much energy is dissipated in this circuit in 4.0 seconds?

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

A resistor operated at 120 V dc is rated at 1.40 kW. (a)What is the normal operating current through the resistor? (b)What is the resistance of the resistor?

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

A 200-Ω resistor is rated at 1/4 W. What is the maximum voltage that can safely be connected across it?

What potential difference is required to cause 4.00 A to flow through a resistance of 330 Ω?

A 120-m long metal wire having a resistivity of 1.68 × 10-8 Ω ∙ m has a resistance of 6.0 Ω. What is the diameter of the wire?

A toaster is rated at 800 W when operating at 120 V dc. What is the resistance of its heating element?

If a quantity you calculated has units of kg⋅m2 s⋅C2\frac { \mathrm { kg } \cdot \mathrm { m } ^ { 2 } } { \mathrm {~s} \cdot \mathrm { C } ^ { 2 } } s⋅C2kg⋅m2​ what is that quantity?

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How much current will be flowing through a $57.0 - \mathrm { m }$ length of copper wire with radius $0.0 \mathrm {~mm}$ if it is connected to a source supplying $62.0 \mathrm {~V} ?$ The resistivity of the metal is 1.68 × 10^-8 ? ? m.

A tube of mercury with resistivity 9.84 × 10^-7 Ω ∙ m has a uniform electric field of 23 N/C inside the mercury. How much current is flowing in the tube, if the radius of the tube is 0.495 mm?

The resistivity of a 1.0 m long copper wire is 1.72 × 10^-8 Ω ∙ m and its cross sectional area is 2.0 × 10^-6 m². If the wire carries a current of 0.20 A, what is the voltage across the wire?

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?

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

A 120-m long metal wire having a resistivity of 1.68 × 10^-8 Ω ∙ m has a resistance of 6.0 Ω. What is the diameter of the wire?

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