If R1 = 6 $\Omega$, R2 = 8 $\Omega$, R3 = 2 $\Omega$, $\varepsilon$1 = 4 V, and $\varepsilon$2 = 14 V, what is the current in R2?

A) 1 A B) 2 A C) 3 A D) 4 A E) 5 A A) 1 A B) 2 A C) 3 A D) 4 A E) 5 A

Three resistors, R1 = 9.0 $\Omega$, R2 = 3.0 $\Omega$, and R3 = 1.0 $\Omega$, are connected in parallel to a 9.0 V battery.What is the power dissipated by the R2?

A) 2.0 W B) 3.0 W C) 9.0 W D) 27 W E) 81 W A) 2.0 W B) 3.0 W C) 9.0 W D) 27 W E) 81 W

Two copper wires,one double the diameter of the other,have the same current flowing through them.If the thinner wire has a drift velocity v1,and the thicker wire has a drift velocity v2,how do the drift velocities of the charge carriers compare?

A) v1 = v2 B) v1 = 2 v2 C) 2 v1 = v2 D) v1 = 4 v2 E) 4 v1 = v2 A) v1 = v2 B) v1 = 2 v2 C) 2 v1 = v2 D) v1 = 4 v2 E) 4 v1 = v2

Three resistors, R1 = 4 $\Omega$, R2 = 3.0 $\Omega$, and R3 = 2.0 $\Omega$, are connected in series to a 9.0 V battery.What is the power dissipated by R1?

A) 2.0 W B) 4.0 W C) 5.1 W D) 9.0 W E) 2.3 W A) 2.0 W B) 4.0 W C) 5.1 W D) 9.0 W E) 2.3 W

Exam 18: Electric Current and Circuits

If R₁ = 6 $\Omega$ , R₂ = 8 $\Omega$ , R₃ = 2 $\Omega$ , $\varepsilon$ ₁ = 4 V, and $\varepsilon$ ₂ = 14 V, what is the current in R₂? $If R1 = 6 \Omega , R2 = 8 \Omega , R3 = 2 \Omega , \varepsilon 1 = 4 V, and \varepsilon 2 = 14 V, what is the current in R2?$

(Multiple Choice)

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Question 21

A 2.0 $\Omega$ resistor is connected across a 6.0 V power supply.An ammeter with internal resistance of 1.0 $\Omega$ is used to measure the current in this circuit.What is the ammeter reading?

(Multiple Choice)

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Question 22

Capacitors of values 1.0 F, 2.0 F, 3.0 F, and 6.0 F are connected in series across a 12 V power supply.Which capacitor has the greatest potential difference across it?

(Multiple Choice)

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Question 23

Three resistors, R₁ = 9.0 $\Omega$ , R₂ = 3.0 $\Omega$ , and R₃ = 1.0 $\Omega$ , are connected in parallel to a 9.0 V battery.What is the power dissipated by the R₂?

(Multiple Choice)

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Question 24

A 6.0 $\Omega$ resistor and a 3.0 $\Omega$ resistor are connected in parallel to a 1.5 V battery of negligible internal resistance.What is the current in the 3.0 $\Omega$ resistor?

(Multiple Choice)

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Question 25

A resistor has a resistance of 30 $\Omega$ at 20 $^{\circ}$ C.If the temperature coefficient is 4.5 $\times$ 10³ $^{\circ}$ C^-1,what is its resistance at 200 $^{\circ}$ C?

(Multiple Choice)

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Question 26

A 12.0 V battery has an internal resistance of 0.080 $\Omega$ .If the battery supplies 100 A when connected to a starter motor,what is the resistance of the motor?

(Multiple Choice)

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Question 27

Copper has 8.5 $\times$ 10²⁸ current carrying electrons per m³.A copper wire carries a current of 17 mA,and the drift velocity of the electrons is measured to be 18 $\times$ 10^-6 m/s.What is the wire radius?

(Multiple Choice)

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Question 28

Two copper wires,one double the diameter of the other,have the same current flowing through them.If the thinner wire has a drift velocity v₁,and the thicker wire has a drift velocity v₂,how do the drift velocities of the charge carriers compare?

(Multiple Choice)

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Question 29

A 12.0 V battery is placed across a 4.00 $\Omega$ resistor.If the current through the resistor is 2.80 A,what is the terminal voltage of the battery?

(Multiple Choice)

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Question 30

Three resistors, R₁ = 4 $\Omega$ , R₂ = 3.0 $\Omega$ , and R₃ = 2.0 $\Omega$ , are connected in series to a 9.0 V battery.What is the power dissipated by R₁?

(Multiple Choice)

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Question 31

Capacitors of values 1.0 F, 2.0 F, 3.0 F, and 6.0 F are connected in series across a 12 V power supply.Which capacitor has the greatest charge on it?

(Multiple Choice)

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Question 32

The watt, W, is equivalent to which of the following?

(Multiple Choice)

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Question 33

In an RC circuit with an initially uncharged capacitor,the time constant is the time that is required for the current through the resistor to reach what percentage of its final value?

(Multiple Choice)

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Question 34

If a 22 $\Omega$ resistor has a current of 2.0 A flowing through it,what is the potential difference across it?

(Multiple Choice)

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Question 35

A length of wire has a resistance of 18.0 $\Omega$ .When the wire is uniformly stretched to triple it original length,what resistance results?

(Multiple Choice)

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Question 36

When the voltage across a resistor is decreased by 50%,what happens to the power dissipated?

(Multiple Choice)

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Question 37

A 6.0 $\Omega$ resistor and a 3.0 $\Omega$ resistor are connected in series to a 1.5 V battery of negligible internal resistance.What is the current in the 3.0 $\Omega$ resistor?

(Multiple Choice)

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Question 38

A good ammeter has resistance and a good voltmeter has resistance."Good" means that it affects the system being measured by very little.

(Multiple Choice)

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Question 39

Wire A carries 4 A into a junction,wire B carries 5 A into the same junction,and another wire is connected to the junction.What is the current in this last wire?

(Multiple Choice)

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Question 40

Showing 21 - 40 of 70

Exam 18: Electric Current and Circuits

If R1 = 6 Ω\OmegaΩ , R2 = 8 Ω\OmegaΩ , R3 = 2 Ω\OmegaΩ , ε\varepsilonε 1 = 4 V, and ε\varepsilonε 2 = 14 V, what is the current in R2?

A 2.0 Ω\OmegaΩ resistor is connected across a 6.0 V power supply.An ammeter with internal resistance of 1.0 Ω\OmegaΩ is used to measure the current in this circuit.What is the ammeter reading?

Capacitors of values 1.0 F, 2.0 F, 3.0 F, and 6.0 F are connected in series across a 12 V power supply.Which capacitor has the greatest potential difference across it?

Three resistors, R1 = 9.0 Ω\OmegaΩ , R2 = 3.0 Ω\OmegaΩ , and R3 = 1.0 Ω\OmegaΩ , are connected in parallel to a 9.0 V battery.What is the power dissipated by the R2?

A 6.0 Ω\OmegaΩ resistor and a 3.0 Ω\OmegaΩ resistor are connected in parallel to a 1.5 V battery of negligible internal resistance.What is the current in the 3.0 Ω\OmegaΩ resistor?

A resistor has a resistance of 30 Ω\OmegaΩ at 20 ∘^{\circ}∘ C.If the temperature coefficient is 4.5 ×\times× 103 ∘^{\circ}∘ C-1,what is its resistance at 200 ∘^{\circ}∘ C?

A 12.0 V battery has an internal resistance of 0.080 Ω\OmegaΩ .If the battery supplies 100 A when connected to a starter motor,what is the resistance of the motor?

Copper has 8.5 ×\times× 1028 current carrying electrons per m3.A copper wire carries a current of 17 mA,and the drift velocity of the electrons is measured to be 18 ×\times× 10-6 m/s.What is the wire radius?

Two copper wires,one double the diameter of the other,have the same current flowing through them.If the thinner wire has a drift velocity v1,and the thicker wire has a drift velocity v2,how do the drift velocities of the charge carriers compare?

A 12.0 V battery is placed across a 4.00 Ω\OmegaΩ resistor.If the current through the resistor is 2.80 A,what is the terminal voltage of the battery?

Three resistors, R1 = 4 Ω\OmegaΩ , R2 = 3.0 Ω\OmegaΩ , and R3 = 2.0 Ω\OmegaΩ , are connected in series to a 9.0 V battery.What is the power dissipated by R1?

Capacitors of values 1.0 F, 2.0 F, 3.0 F, and 6.0 F are connected in series across a 12 V power supply.Which capacitor has the greatest charge on it?

The watt, W, is equivalent to which of the following?

In an RC circuit with an initially uncharged capacitor,the time constant is the time that is required for the current through the resistor to reach what percentage of its final value?

If a 22 Ω\OmegaΩ resistor has a current of 2.0 A flowing through it,what is the potential difference across it?

A length of wire has a resistance of 18.0 Ω\OmegaΩ .When the wire is uniformly stretched to triple it original length,what resistance results?

When the voltage across a resistor is decreased by 50%,what happens to the power dissipated?

A 6.0 Ω\OmegaΩ resistor and a 3.0 Ω\OmegaΩ resistor are connected in series to a 1.5 V battery of negligible internal resistance.What is the current in the 3.0 Ω\OmegaΩ resistor?

A good ammeter has ________ resistance and a good voltmeter has ________ resistance."Good" means that it affects the system being measured by very little.

Wire A carries 4 A into a junction,wire B carries 5 A into the same junction,and another wire is connected to the junction.What is the current in this last wire?

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A 2.0 $\Omega$ resistor is connected across a 6.0 V power supply.An ammeter with internal resistance of 1.0 $\Omega$ is used to measure the current in this circuit.What is the ammeter reading?

Three resistors, R₁ = 9.0 $\Omega$ , R₂ = 3.0 $\Omega$ , and R₃ = 1.0 $\Omega$ , are connected in parallel to a 9.0 V battery.What is the power dissipated by the R₂?

A 6.0 $\Omega$ resistor and a 3.0 $\Omega$ resistor are connected in parallel to a 1.5 V battery of negligible internal resistance.What is the current in the 3.0 $\Omega$ resistor?

A resistor has a resistance of 30 $\Omega$ at 20 $^{\circ}$ C.If the temperature coefficient is 4.5 $\times$ 10³ $^{\circ}$ C^-1,what is its resistance at 200 $^{\circ}$ C?

A 12.0 V battery has an internal resistance of 0.080 $\Omega$ .If the battery supplies 100 A when connected to a starter motor,what is the resistance of the motor?

Copper has 8.5 $\times$ 10²⁸ current carrying electrons per m³.A copper wire carries a current of 17 mA,and the drift velocity of the electrons is measured to be 18 $\times$ 10^-6 m/s.What is the wire radius?

Two copper wires,one double the diameter of the other,have the same current flowing through them.If the thinner wire has a drift velocity v₁,and the thicker wire has a drift velocity v₂,how do the drift velocities of the charge carriers compare?

A 12.0 V battery is placed across a 4.00 $\Omega$ resistor.If the current through the resistor is 2.80 A,what is the terminal voltage of the battery?

Three resistors, R₁ = 4 $\Omega$ , R₂ = 3.0 $\Omega$ , and R₃ = 2.0 $\Omega$ , are connected in series to a 9.0 V battery.What is the power dissipated by R₁?

If a 22 $\Omega$ resistor has a current of 2.0 A flowing through it,what is the potential difference across it?

A length of wire has a resistance of 18.0 $\Omega$ .When the wire is uniformly stretched to triple it original length,what resistance results?

A 6.0 $\Omega$ resistor and a 3.0 $\Omega$ resistor are connected in series to a 1.5 V battery of negligible internal resistance.What is the current in the 3.0 $\Omega$ resistor?

A good ammeter has resistance and a good voltmeter has resistance."Good" means that it affects the system being measured by very little.