Question 1

An AM radio tuning circuit has a coil with an inductance of 4.00 mH and a capacitor set at 7.50 × 10−6 μF.What frequency will it detect?

Accepted Answer

A)  1520 kHz 
B)  919 kHz 
C)  550 kHz 
D)  750 kHz 
A)  1520 kHz 
B)  919 kHz 
C)  550 kHz 
D)  750 kHz

Question 2

A transformer is to be designed to increase the 30 kV (rms)output of a generator to the transmission line voltage of 345 kV (rms).If the primary winding has 60 turns,how many turns must the secondary have?

Accepted Answer

A)  57 
B)  6900 
C)  690 
D)  11 
A)  57 
B)  6900 
C)  690 
D)  11

Question 3

An FM radio tuning circuit has a coil with an inductance of 0.0015 mH.What is the value of the capacitance if the set is tuned to 98 MHz?

Accepted Answer

A)  1.8 × 10−6 μF 
B)  0.88 × 10−6 μF 
C)  0.98 × 10−6 μF 
D)  12 × 10−6 μF 
A)  1.8 × 10−6 μF 
B)  0.88 × 10−6 μF 
C)  0.98 × 10−6 μF 
D)  12 × 10−6 μF

Question 4

A resistor,inductor,and capacitor are connected in series,each with effective (rms)voltage of 65 V,150 V,and 80 V,respectively.What is the value of the effective (rms)voltage of the applied source in the circuit?

Accepted Answer

A)  295 V 
B)  48 V 
C)  96 V 
D)  88 V 
A)  295 V 
B)  48 V 
C)  96 V 
D)  88 V

Question 5

A series LC circuit in a radio is in resonance with AM 1200 kHz.If the radio station is changed to AM 600 kHz,by what factor must the capacitance be multiplied to again achieve resonance?

Accepted Answer

A)  4 
B)  2 
C)  1/2 
D)  1/4 
A)  4 
B)  2 
C)  1/2 
D)  1/4

Question 6

A 400-Ω resistor and a capacitor are connected in parallel across a 300-Hz source.If the amplitude of the current in the resistor is equal to that in the capacitor,what is the value of the capacitance?

Accepted Answer

A)  1.33 × 10-6 F 
B)  0.750 × 10-6 F 
C)  10.6 × 10-6 F 
D)  0.212 F 
A)  1.33 × 10-6 F 
B)  0.750 × 10-6 F 
C)  10.6 × 10-6 F 
D)  0.212 F

Question 7

An AC series circuit contains a resistor of 20 Ω,a capacitor of 0.75 μF,and an inductor of 80 mH.What frequency should be used to create a resonance condition in the circuit?

Accepted Answer

A)  650 Hz 
B)  530 Hz 
C)  160 Hz 
D)  320 Hz 
A)  650 Hz 
B)  530 Hz 
C)  160 Hz 
D)  320 Hz

Question 8

The primary winding of an electric train transformer has 200 turns,and the secondary has 50.If the input voltage is 120 V(rms),what is the output voltage?

Accepted Answer

A)  30 V 
B)  15 V 
C)  10 V 
D)  480 V 
A)  30 V 
B)  15 V 
C)  10 V 
D)  480 V

Question 9

A resistor and capacitor are connected in series with an applied AC voltage source.Separate voltmeter readings across the resistor and capacitor give values of 50 V and 60 V (rms),respectively.What is the effective (rms)voltage of the source?

Accepted Answer

A)  78 V 
B)  90 V 
C)  110 V 
D)  25 V 
A)  78 V 
B)  90 V 
C)  110 V 
D)  25 V

Exam 22: Reflection and Refraction of Light: Part A

An AM radio tuning circuit has a coil with an inductance of 4.00 mH and a capacitor set at 7.50 × 10−6 μF.What frequency will it detect?

A transformer is to be designed to increase the 30 kV (rms)output of a generator to the transmission line voltage of 345 kV (rms).If the primary winding has 60 turns,how many turns must the secondary have?

An FM radio tuning circuit has a coil with an inductance of 0.0015 mH.What is the value of the capacitance if the set is tuned to 98 MHz?

A resistor,inductor,and capacitor are connected in series,each with effective (rms)voltage of 65 V,150 V,and 80 V,respectively.What is the value of the effective (rms)voltage of the applied source in the circuit?

A series LC circuit in a radio is in resonance with AM 1200 kHz.If the radio station is changed to AM 600 kHz,by what factor must the capacitance be multiplied to again achieve resonance?

A 400-Ω resistor and a capacitor are connected in parallel across a 300-Hz source.If the amplitude of the current in the resistor is equal to that in the capacitor,what is the value of the capacitance?

An AC series circuit contains a resistor of 20 Ω,a capacitor of 0.75 μF,and an inductor of 80 mH.What frequency should be used to create a resonance condition in the circuit?

The primary winding of an electric train transformer has 200 turns,and the secondary has 50.If the input voltage is 120 V(rms),what is the output voltage?

A resistor and capacitor are connected in series with an applied AC voltage source.Separate voltmeter readings across the resistor and capacitor give values of 50 V and 60 V (rms),respectively.What is the effective (rms)voltage of the source?

Introduction

Introduction: Part A

Motion in One Dimension

Motion in One Dimension: Part A

Vectors and Two-Dimensional Motion

Vectors and Two-Dimensional Motion: Part A

The Laws of Motion

The Laws of Motion: Part A

Energy

Energy: Part A

Momentum and Collisions

Momentum and Collisions: Part A

Rotational Motion and the Law of Gravity

Rotational Motion and the Law of Gravity: Part A

Rotational Equilibrium and Rotational Dynamics

Rotational Equilibrium and Rotational Dynamics: Part A

Solids and Fluids

Solids and Fluids: Part A

Thermal Physics

Thermal Physics: Part A

Energy in Thermal Processes Heat and Internal Energy

Energy in Thermal Processes Heat and Internal Energy: Part A

The Laws of Thermodynamics Work in Thermodynamic Processes

The Laws of Thermodynamics Work in Thermodynamic Processes: Part A

Vibrations and Waves

Vibrations and Waves: Part A

Sound

Sound: Part A

Electric Forces and Electric Fields

Electric Forces and Electric Fields: Part A

Electrical Energy and Capacitance

Electrical Energy and Capacitance: Part A

Current and Resistance Electric Current

Current and Resistance Electric Current: Part A

Direct-Current Circuits Sources of EMF

Direct-Current Circuits Sources of EMF: Part A

Magnetism Magnets

Magnetism Magnets: Part A

Induced Voltages and Inductance

Induced Voltages and Inductance: Part A

Alternating-Current Circuits and Electromagnetic Waves

Alternating-Current Circuits and Electromagnetic Waves: Part A

Reflection and Refraction of Light

Mirrors and Lenses

Mirrors and Lenses: Part A

Wave Optics

Wave Optics: Part A

Optical Instruments

Optical Instruments: Part A

Relativity

Relativity: Part A

Quantum Physics Blackbody Radiation and Plancks Hypothesis

Quantum Physics Blackbody Radiation and Plancks Hypothesis: Part A

Atomic Physics

Atomic Physics: Part A

Nuclear Physics

Nuclear Physics: Part A

Nuclear Energy and Elementary Particles

Nuclear Energy and Elementary Particles: Part A

Particle Collisions, Mediating Photons, and Quark Structures: Exploring the Fundamentals of Physics

Filters

An AM radio tuning circuit has a coil with an inductance of 4.00 mH and a capacitor set at 7.50 × 10−⁶ μF.What frequency will it detect?