If R1 = 6.0 Ω, R2 = 8.0 Ω, R3 = 2.0 Ω, ε1 = 4.0 V, and ε2 = 14 V, what is the power supplied to the circuit by ε1?

A) 4.0 W B) 8.0 W C) 12 W D) 16 W E) 20 W A) 4.0 W B) 8.0 W C) 12 W D) 16 W E) 20 W

Three resistors, R1 = 4 Ω, R2 = 3.0 Ω, and R3 = 2.0 Ω, 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

Silver contains 5.8 × 1028 conduction electrons per m3. How many conduction electrons are in a 1.0 m length of silver wire of diameter 2.6 mm?

A) 1.9 × 105 B) 4.7 × 104 C) 3.1 × 1023 D) 1.2 × 1024 E) 6.0 × 1023 A) 1.9 × 105 B) 4.7 × 104 C) 3.1 × 1023 D) 1.2 × 1024 E) 6.0 × 1023

Exam 18: Electric Current and Circuits

A capacitor is connected in series with a resistor and a switch. With the switch open, the capacitor is charged to 9.0 V. When the switch is closed, how long will it take for the voltage across the capacitor to drop to 6.0 V if the time constant of the circuit is 4.0 s?

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Question 1

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The arrangement shown is composed of four 6.0 mF capacitors. What is the capacitance of the combination?

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Question 2

Correct Answer:

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Two carbon cylinders have radii r and 2r, and they both have length L. What is the resistance of the first if the resistance of the second is 12Ω?

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Question 3

Correct Answer:

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What is the resistance of this combination of resistors?

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Question 4

An ohm is equivalent to which of the following?

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Question 5

An ampere, A, is equivalent to a

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Question 6

A variable resistor is connected to a constant voltage source. When the resistance is increased from 5.5 Ω to 9.3 Ω, what happens to the power dissipated?

(Multiple Choice)

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Question 7

In a circuit, three pieces of wire labeled A, B and C are joined at a common point D. If wire B carries 1.5 mA in a direction away from D, and wire C carries current 1.3 mA toward D, what does wire A carry?

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Question 8

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

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Question 9

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?

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Question 10

A variable resistor has a voltage of 12.0 V placed across it. If the resistance is increased 20%, what happens to the current flowing through it?

(Multiple Choice)

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Question 11

One hundred meters of a certain type of wire has a resistance of 7.2 Ω. What is the resistance of 2.5 m of this wire?

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Question 12

A length L₀ of wire has a resistance of 32.0 Ω. The wire is uniformly stretched (i.e., the total volume of the wire is unchanged during the stretching) to four times its original length, or 4 L₀. If a length L₀ is now cut from the stretched wire, what is its resistance?

(Multiple Choice)

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Question 13

A 12.0 V battery is connected across a 4.00 Ω 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 14

If R₁ = 6.0 Ω, R₂ = 8.0 Ω, R₃ = 2.0 Ω, ε₁ = 4.0 V, and ε₂ = 14 V, what is the power supplied to the circuit by ε₁?

(Multiple Choice)

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Question 15

Two capacitors of values 6.0 mF and 9.0 mF are connected in series. What is the capacitance of the combination?

(Multiple Choice)

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Question 16

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

(Multiple Choice)

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Question 17

Silver contains 5.8 × 10²⁸ conduction electrons per m³. How many conduction electrons are in a 1.0 m length of silver wire of diameter 2.6 mm?

(Multiple Choice)

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Question 18

Of the common battery sizes AAA, AA, C, and D, which provides the highest emf?

(Multiple Choice)

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Question 19

A potential difference of 12.4 V is placed across a 4.1 Ω resistor. What is the current in the resistor?

(Multiple Choice)

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Question 20

Showing 1 - 20 of 75

Exam 18: Electric Current and Circuits

A capacitor is connected in series with a resistor and a switch. With the switch open, the capacitor is charged to 9.0 V. When the switch is closed, how long will it take for the voltage across the capacitor to drop to 6.0 V if the time constant of the circuit is 4.0 s?

The arrangement shown is composed of four 6.0 mF capacitors. What is the capacitance of the combination?

Two carbon cylinders have radii r and 2r, and they both have length L. What is the resistance of the first if the resistance of the second is 12Ω?

What is the resistance of this combination of resistors?

An ohm is equivalent to which of the following?

An ampere, A, is equivalent to a

A variable resistor is connected to a constant voltage source. When the resistance is increased from 5.5 Ω to 9.3 Ω, what happens to the power dissipated?

In a circuit, three pieces of wire labeled A, B and C are joined at a common point D. If wire B carries 1.5 mA in a direction away from D, and wire C carries current 1.3 mA toward D, what does wire A carry?

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

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?

A variable resistor has a voltage of 12.0 V placed across it. If the resistance is increased 20%, what happens to the current flowing through it?

One hundred meters of a certain type of wire has a resistance of 7.2 Ω. What is the resistance of 2.5 m of this wire?

A length L0 of wire has a resistance of 32.0 Ω. The wire is uniformly stretched (i.e., the total volume of the wire is unchanged during the stretching) to four times its original length, or 4 L0. If a length L0 is now cut from the stretched wire, what is its resistance?

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

If R1 = 6.0 Ω, R2 = 8.0 Ω, R3 = 2.0 Ω, ε1 = 4.0 V, and ε2 = 14 V, what is the power supplied to the circuit by ε1?

Two capacitors of values 6.0 mF and 9.0 mF are connected in series. What is the capacitance of the combination?

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

Silver contains 5.8 × 1028 conduction electrons per m3. How many conduction electrons are in a 1.0 m length of silver wire of diameter 2.6 mm?

Of the common battery sizes AAA, AA, C, and D, which provides the highest emf?

A potential difference of 12.4 V is placed across a 4.1 Ω resistor. What is the current in the resistor?

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A length L₀ of wire has a resistance of 32.0 Ω. The wire is uniformly stretched (i.e., the total volume of the wire is unchanged during the stretching) to four times its original length, or 4 L₀. If a length L₀ is now cut from the stretched wire, what is its resistance?

If R₁ = 6.0 Ω, R₂ = 8.0 Ω, R₃ = 2.0 Ω, ε₁ = 4.0 V, and ε₂ = 14 V, what is the power supplied to the circuit by ε₁?

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

Silver contains 5.8 × 10²⁸ conduction electrons per m³. How many conduction electrons are in a 1.0 m length of silver wire of diameter 2.6 mm?