Question 1

The graph shows the impedance as a function of frequency for a series RCL circuit.At what frequency does the capacitor make the largest contribution?

Accepted Answer

A) f1 
B) f2 
C) f3 
D) f1 or f3 
E) f1 or f2 or f3 
A) f1 
B) f2 
C) f3 
D) f1 or f3 
E) f1 or f2 or f3 A

Question 2

The voltage across and the current through a single circuit element connected to an ac generator are shown in the graph.  
-Note the following circuit elements: (1) resistors, (2) capacitors, and (3) inductors.Which of these elements uses no energy, on average, in an ac circuit?

Accepted Answer

A) 1 only 
B) 2 only 
C) 3 only 
D) both 2 and 3 
E) both 1 and 3 
A) 1 only 
B) 2 only 
C) 3 only 
D) both 2 and 3 
E) both 1 and 3 D

Question 3

An ac generator supplies a peak (not rms) voltage of 120.0 V at 60.0 Hz.It is connected in series with a 50.0- $\Omega$ resistor and a 0.500-H inductor.
-What is the peak current through the resistor?

Accepted Answer

A) 2.40 A 
B) 1.71 A 
C) 1.33 A 
D) 0.617 A 
E) 0.437 A 
A) 2.40 A 
B) 1.71 A 
C) 1.33 A 
D) 0.617 A 
E) 0.437 A D

Question 4

An ac circuit consists of a series combination of an inductor and a capacitor.What is the phase angle between the voltages across these two circuit elements?

Accepted Answer

A) 0° 
B) 90° 
C) 180° 
D) 270° 
E) 360° 
A) 0° 
B) 90° 
C) 180° 
D) 270° 
E) 360°

Question 5

Which one of the following graphs shows how the inductive reactance varies with frequency?

Accepted Answer

A) a 
B) b 
C) c 
D) d 
E) e 
A) a 
B) b 
C) c 
D) d 
E) e

Question 6

An ac generator supplies an rms (not peak) voltage of 180 V at 60.0 Hz.The generator is connected in series with a 0.50-H inductor, a 6.0-µF capacitor and a 300- $\Omega$ resistor.
-What is the peak (not rms) voltage across the capacitor?

Accepted Answer

A) 120 V 
B) 180 V 
C) 190 V 
D) 210 V 
E) 290 V 
A) 120 V 
B) 180 V 
C) 190 V 
D) 210 V 
E) 290 V

Question 7

In an ac circuit, a 0.055-H inductor is connected to a generator that has an rms voltage of 18 V and operates at 50.0 Hz.What is the rms current through the inductor?

Accepted Answer

A) 0.62 A 
B) 2.0 A 
C) 3.2 A 
D) 1.0 A 
E) 14 A 
A) 0.62 A 
B) 2.0 A 
C) 3.2 A 
D) 1.0 A 
E) 14 A

Question 8

An ac generator supplies a peak (not rms) voltage of 150 V at 60.0 Hz.The generator is connected in series with a 35-mH inductor, a 45-µF capacitor and an 85- $\Omega$ resistor.
-Which one of the following statements concerning this circuit is true?

Accepted Answer

A) The voltage leads the current. 
B) The circuit is more capacitive than inductive. 
C) The voltage and current are exactly out of phase. 
D) The voltage and current are in phase. 
E) The phase angle for this circuit is positive. 
A) The voltage leads the current. 
B) The circuit is more capacitive than inductive. 
C) The voltage and current are exactly out of phase. 
D) The voltage and current are in phase. 
E) The phase angle for this circuit is positive.

Question 9

An ac generator supplies a peak (not rms) voltage of 150 V at 60.0 Hz.The generator is connected in series with a 35-mH inductor, a 45-µF capacitor and an 85- $\Omega$ resistor.
-Determine the rms current in the circuit.

Accepted Answer

A) 0.28 A 
B) 0.40 A 
C) 0.75 A 
D) 1.1 A 
E) 1.6 A 
A) 0.28 A 
B) 0.40 A 
C) 0.75 A 
D) 1.1 A 
E) 1.6 A

Question 10

An ac generator supplies an rms (not peak) voltage of 180 V at 60.0 Hz.The generator is connected in series with a 0.50-H inductor, a 6.0-µF capacitor and a 300- $\Omega$ resistor.
-What is the impedance of the circuit?

Accepted Answer

A) 150  $\Omega$ 
B) 190  $\Omega$ 
C) 360  $\Omega$ 
D) 390  $\Omega$ 
E) 440  $\Omega$ 
A) 150  $\Omega$ 
B) 190  $\Omega$ 
C) 360  $\Omega$ 
D) 390  $\Omega$ 
E) 440  $\Omega$

Question 11

The graph shows the voltage across and the current through a single circuit element connected to an ac generator.  
-What is the reactance of this element?

Accepted Answer

A) 20  $\Omega$ 
B) 25  $\Omega$ 
C) 30  $\Omega$ 
D) 35  $\Omega$ 
E) 40 $\Omega$ 
A) 20  $\Omega$ 
B) 25  $\Omega$ 
C) 30  $\Omega$ 
D) 35  $\Omega$ 
E) 40 $\Omega$

Question 12

Which one of the following graphs illustrates how capacitive reactance varies with frequency?

Accepted Answer

A) a 
B) b 
C) c 
D) d 
E) e 
A) a 
B) b 
C) c 
D) d 
E) e

Question 13

The reactance of a capacitor in a circuit at 110 Hz is 35  $\Omega$.Determine the capacitance.

Accepted Answer

A) 41 µF 
B) 260 µF 
C) 51 mF 
D) 0.10 F 
E) 0.31 F 
A) 41 µF 
B) 260 µF 
C) 51 mF 
D) 0.10 F 
E) 0.31 F

Question 14

An oscillating LC circuit has a resonant frequency of 1.2 × 10S1U1P16 S1S1P0Hz.The diagram shows the system at t = 0 s when there is no charge on the capacitor and the current is in the direction shown.At this time, the energy stored in the inductor is 2.5 × 10S1U1P1-S1S1P0S1U1P17 S1S1P0J.  
-Determine the numerical value of the capacitance.

Accepted Answer

A) 2.4 × 10-11 F 
B) 3.6 × 10-11 F 
C) 4.4 × 10-11 F 
D) 6.8 × 10-11 F 
E) 8.8 × 10-11 F 
A) 2.4 × 10-11 F 
B) 3.6 × 10-11 F 
C) 4.4 × 10-11 F 
D) 6.8 × 10-11 F 
E) 8.8 × 10-11 F

Question 15

An ac generator supplies an rms (not peak) voltage of 180 V at 60.0 Hz.The generator is connected in series with a 0.50-H inductor, a 6.0-µF capacitor and a 300- $\Omega$ resistor.
-What is the peak (not rms) voltage across the inductor?

Accepted Answer

A) 120 V 
B) 180 V 
C) 190 V 
D) 260 V 
E) 290 V 
A) 120 V 
B) 180 V 
C) 190 V 
D) 260 V 
E) 290 V

Question 16

A variable inductor is connected to an ac source.What effect does increasing the inductance have on the reactance and current in this circuit?

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 17

For which one of the following circuit arrangements will the power factor be non-zero?

Accepted Answer

A) a capacitor in series with an ac generator 
B) an inductor in series with an ac generator 
C) two capacitors in series with an ac generator 
D) a capacitor and resistor in series with an ac generator 
E) a capacitor and inductor in series with an ac generator 
A) a capacitor in series with an ac generator 
B) an inductor in series with an ac generator 
C) two capacitors in series with an ac generator 
D) a capacitor and resistor in series with an ac generator 
E) a capacitor and inductor in series with an ac generator

Question 18

The graph shows the voltage across and the current through a single circuit element connected to an ac generator.  
-Identify the circuit element.

Accepted Answer

A) The element is a 25- $\Omega$resistor. 
B) The element is a 35- $\Omega$ resistor. 
C) The element is a 0.45-H inductor. 
D) The element is a 360-µF capacitor. 
E) The element is a 510-µF capacitor. 
A) The element is a 25- $\Omega$resistor. 
B) The element is a 35- $\Omega$ resistor. 
C) The element is a 0.45-H inductor. 
D) The element is a 360-µF capacitor. 
E) The element is a 510-µF capacitor.

Question 19

The table below shows the values of the resistance, capacitive reactance and inductive reactance for five RCL circuits.In which circuit will the voltage lead the current?

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 20

An ac generator supplies a peak (not rms) voltage of 120.0 V at 60.0 Hz.It is connected in series with a 50.0- $\Omega$ resistor and a 0.500-H inductor.
-What is the rms voltage of the generator?

Accepted Answer

A) 84.9 V 
B) 138 V 
C) 151 V 
D) 169 V 
E) 240 V 
A) 84.9 V 
B) 138 V 
C) 151 V 
D) 169 V 
E) 240 V

Exam 23: Alternating Current Circuits

The graph shows the impedance as a function of frequency for a series RCL circuit.At what frequency does the capacitor make the largest contribution?

The voltage across and the current through a single circuit element connected to an ac generator are shown in the graph. -Note the following circuit elements: (1) resistors, (2) capacitors, and (3) inductors.Which of these elements uses no energy, on average, in an ac circuit?

An ac generator supplies a peak (not rms) voltage of 120.0 V at 60.0 Hz.It is connected in series with a 50.0- Ω\OmegaΩ resistor and a 0.500-H inductor. -What is the peak current through the resistor?

An ac circuit consists of a series combination of an inductor and a capacitor.What is the phase angle between the voltages across these two circuit elements?

Which one of the following graphs shows how the inductive reactance varies with frequency?

An ac generator supplies an rms (not peak) voltage of 180 V at 60.0 Hz.The generator is connected in series with a 0.50-H inductor, a 6.0-µF capacitor and a 300- Ω\OmegaΩ resistor. -What is the peak (not rms) voltage across the capacitor?

In an ac circuit, a 0.055-H inductor is connected to a generator that has an rms voltage of 18 V and operates at 50.0 Hz.What is the rms current through the inductor?

An ac generator supplies a peak (not rms) voltage of 150 V at 60.0 Hz.The generator is connected in series with a 35-mH inductor, a 45-µF capacitor and an 85- Ω\OmegaΩ resistor. -Which one of the following statements concerning this circuit is true?

An ac generator supplies a peak (not rms) voltage of 150 V at 60.0 Hz.The generator is connected in series with a 35-mH inductor, a 45-µF capacitor and an 85- Ω\OmegaΩ resistor. -Determine the rms current in the circuit.

An ac generator supplies an rms (not peak) voltage of 180 V at 60.0 Hz.The generator is connected in series with a 0.50-H inductor, a 6.0-µF capacitor and a 300- Ω\OmegaΩ resistor. -What is the impedance of the circuit?

The graph shows the voltage across and the current through a single circuit element connected to an ac generator. -What is the reactance of this element?

Which one of the following graphs illustrates how capacitive reactance varies with frequency?

The reactance of a capacitor in a circuit at 110 Hz is 35 Ω\OmegaΩ .Determine the capacitance.

An ac generator supplies an rms (not peak) voltage of 180 V at 60.0 Hz.The generator is connected in series with a 0.50-H inductor, a 6.0-µF capacitor and a 300- Ω\OmegaΩ resistor. -What is the peak (not rms) voltage across the inductor?

A variable inductor is connected to an ac source.What effect does increasing the inductance have on the reactance and current in this circuit?

For which one of the following circuit arrangements will the power factor be non-zero?

The graph shows the voltage across and the current through a single circuit element connected to an ac generator. -Identify the circuit element.

The table below shows the values of the resistance, capacitive reactance and inductive reactance for five RCL circuits.In which circuit will the voltage lead the current?

An ac generator supplies a peak (not rms) voltage of 120.0 V at 60.0 Hz.It is connected in series with a 50.0- Ω\OmegaΩ resistor and a 0.500-H inductor. -What is the rms voltage of the generator?

Introduction and Mathematical Concepts

Kinematics in One Dimension

Kinematics in Two Dimensions

Forces and Newtons Laws of Motion

Dynamics of Uniform Circular Motion

Work and Energy

Impulse and Momentum

Rotational Kinematics

Rotational Dynamics

Simple Harmonic Motion and Elasticity

Fluids

Temperature and Heat

The Transfer of Heat

The Ideal Gas Law and Kinetic Theory

Thermodynamics

Waves and Sound

The Principle of Linear Superposition and Interference Phenomena

Electric Forces and Electric Fields

Electric Potential Energy and the Electric Potential

Electric Circuits

Magnetic Forces and Magnetic Fields

Electromagnetic Induction

Electromagnetic Waves

The Reflection of Light: Mirrors

The Refraction of Light: Lenses and Optical Instruments

Interference and the Wave Nature of Light

Special Relativity

Particles and Waves

The Nature of the Atom

Nuclear Physics and Radioactivity

Ionizing Radiation, Nuclear Energy, and Elementary Particles

Filters

An ac generator supplies a peak (not rms) voltage of 120.0 V at 60.0 Hz.It is connected in series with a 50.0- $\Omega$ resistor and a 0.500-H inductor. -What is the peak current through the resistor?

An ac generator supplies an rms (not peak) voltage of 180 V at 60.0 Hz.The generator is connected in series with a 0.50-H inductor, a 6.0-µF capacitor and a 300- $\Omega$ resistor. -What is the peak (not rms) voltage across the capacitor?

An ac generator supplies a peak (not rms) voltage of 150 V at 60.0 Hz.The generator is connected in series with a 35-mH inductor, a 45-µF capacitor and an 85- $\Omega$ resistor. -Which one of the following statements concerning this circuit is true?

An ac generator supplies a peak (not rms) voltage of 150 V at 60.0 Hz.The generator is connected in series with a 35-mH inductor, a 45-µF capacitor and an 85- $\Omega$ resistor. -Determine the rms current in the circuit.

An ac generator supplies an rms (not peak) voltage of 180 V at 60.0 Hz.The generator is connected in series with a 0.50-H inductor, a 6.0-µF capacitor and a 300- $\Omega$ resistor. -What is the impedance of the circuit?

The reactance of a capacitor in a circuit at 110 Hz is 35 $\Omega$ .Determine the capacitance.

An ac generator supplies an rms (not peak) voltage of 180 V at 60.0 Hz.The generator is connected in series with a 0.50-H inductor, a 6.0-µF capacitor and a 300- $\Omega$ resistor. -What is the peak (not rms) voltage across the inductor?

An ac generator supplies a peak (not rms) voltage of 120.0 V at 60.0 Hz.It is connected in series with a 50.0- $\Omega$ resistor and a 0.500-H inductor. -What is the rms voltage of the generator?