General Physics II Question Bank - 1470 Verified Questions by Quizplus

General Physics II Question

Bank

Course Introduction

General Physics II is a continuation of introductory physics, focusing on the fundamental principles of electromagnetism, optics, and modern physics. Topics typically include electric and magnetic fields, electric circuits, electromagnetic waves, geometric and physical optics, and an introduction to topics such as quantum physics and relativity. The course emphasizes the application of mathematical and conceptual problem-solving skills, integrating laboratory experiments to reinforce theoretical concepts and develop practical scientific approaches to understanding the physical world.

Recommended Textbook

College Physics Strategic Approach with Mastering Physics 2nd Edition by Randall D. Knight

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30 Chapters

1470 Verified Questions

1470 Flashcards

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Page 2

Chapter 1: Representing Motion

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Sample Questions

Q1) The change in the position vector of a moving object is equal to the distance it has moved.

A)True

B)False

Answer: False

Q2) The following conversion equivalents are given:

1 gal = 231 in3 1 ft = 12 in 1 min = 60 s A pipe delivers water at the rate of 95 gal/min.The rate,in in3/s,is closest to:

A)0.21

B)0.19

C)0.17

D)0.15

E)0.14

Answer: A

Q3) Since vectors always have positive magnitudes,the sum of two vectors must have a magnitude greater than the magnitude of either one of them.

A)True

B)False

Answer: False

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Chapter 2: Motion in One Dimension

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Sample Questions

Q1) A car accelerates from 5.0 m/s to 21 m/s at a rate of 3.0 m/s2.How far does it travel while accelerating?

A)69 m

B)207 m

C)41 m

D)117 m

Answer: A

Q2) What quantity is measured by your speedometer (be as specific as possible)?

Answer: Your speedometer tells you the instantaneous speed of your car.

Q3) Assuming equal rates of acceleration in both cases,how much further would you travel if braking from 56 mi/h to rest than from 28 mi/h?

A)4 times farther

B)3.2 times farther

C)4.8 times farther

D)5.2 times farther

Answer: A

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Page 4

Chapter 3: Vectors and Motion in Two Dimensions

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Sample Questions

Q1) The components of a vector will be the same no matter what coordinate system is used to express that vector.

A)True

B)False

Answer: False

Q2) You walk 53 m to the north,then turn 60° to your right and walk another 45 m.Determine the direction of your displacement vector.Express your answer as an angle relative to east.

A)63° N of E

B)50° N of E

C)57° N of E

D)69° N of E

Answer: A

Q3) You are taking a turn at 23.0 m/s on a ramp of radius 39.0 m.What is your acceleration?

A)13.6 m/s2

B)0.590 m/s2

C)66.1 m/s2

D)1.70 m/s2

Answer: A

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Chapter 4: Forces and Newtons Laws of Motion

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Sample Questions

Q1) A person gives a shopping cart an initial push along a horizontal floor to get it moving,and then lets go.The cart travels forward along the floor,gradually slowing as it moves.Consider the horizontal force(s)on the cart while it is moving forward and slowing.Which of the following statements is correct?

A)Both a forward and a backward force are acting on the cart,but the forward force is larger.

B)Both a forward and a backward force are acting on the cart,but the backward force is larger.

C)Only a forward force is acting,which diminishes with time.

D)Only a backward force is acting,no forward force.

Q2) An object is moving to the right,and experiencing a net force that is directed to the right.The magnitude of the force is decreasing with time.The speed of the object is A)increasing.

B)decreasing.

C)constant in time.

Q3) Newton's Third Law suggests that a book sitting on a flat table experiences an upward force due to the table.If this is true,why doesn't the book start moving upward?

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Page 6

Chapter 5: Applying Newtons Laws

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Sample Questions

Q1) If you were to move into outer space far from any stars or planets,

A)your mass would change,but your weight would not change.

B)your weight would change,but your mass would not change.

C)both your weight and mass would change.

D)neither your weight nor your mass would change.

E)None of these is true.

Q2) A 75 pound box rests on a perfectly smooth horizontal surface.Any horizontal force greater than zero will cause it to start moving.

A)True

B)False

Q3) A driver in a 1000.0 kg car traveling at 24 m/s slams on the brakes and skids to a stop.If the coefficient of friction between the tires and the road is 0.80,how long will the skid marks be?

A)37 m

B)30 m

C)46 m

D)34 m

Q4) Explain,from a force standpoint,how a rear spoiler on a race car helps keep the car on the road at high speeds.

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Chapter 6: Circular Motion,orbits,and Gravity

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Sample Questions

Q1) A merry-go-round is spinning at a fixed rate.As a person is walking toward the edge,

A)the force of static friction must increase in order for the person not to slide off.

B)the force of static friction must decrease in order for the person not to slide off.

C)the force of static friction such that the person does not slide off remains the same.

Q2) An electrical motor spins at a constant 2857.0 rpm.If the armature radius is 2.685 cm,what is the acceleration of the edge of the rotor?

A)2403 m/s2

B)844.4 m/s2

C)241,100 m/s2

D)84.40 m/s2

Q3) If a highway curve is properly banked and posted at 45 mph,it is a good idea to drive somewhat below this speed if your tires are bald or if the road is icy.

A)True

B)False

Q4) Can a satellite be in an elliptical orbit under uniform circular motion?

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Chapter 7: Rotational Motion

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Sample Questions

Q1) A torque of 12 N m is applied to a solid,uniform disk of radius 0.50 m.If the disk accelerates at 5.7 rad/s2,what is the mass of the disk?

A)17 kg

B)13 kg

C)8.5 kg

D)4.3 kg

Q2) A disk and a sphere are released simultaneously at the top of an inclined plane.They roll down without slipping.Which will reach the bottom first?

A)the one of smallest diameter

B)the one of greatest mass

C)the disk

D)the sphere

E)They will reach the bottom at the same time.

Q3) A tall tree and a short tree (both having the same width and mass density)are cut at the base at the same time,and begin tipping over.Which tree hits the ground first?

A)the small tree

B)the tall tree

C)They hit at the same time.

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Chapter 8: Equilibrium and Elasticity

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Sample Questions

Q1) If the forces on an object balance,it does not necessarily follow that the torques balance.

A)True

B)False

Q2) A force of 30 N stretches a spring 0.73 m from equilibrium.What is the value of the spring constant?

A)41 N/m

B)22 N/m

C)34 N/m

D)46 N/m

Q3) Suppose that a heavy person and a light person are balanced on a teeter-totter made of a plank of wood.Each person now moves in toward the fulcrum a distance of 25 cm.What effect will this have on the balance of the teeter-totter?

A)The teeter-totter will remain in balance.

B)The heavy person's end will go down.

C)The light person's end will go down.

D)One cannot tell whether either end will rise or fall without knowing the relative mass of the plank.

E)Only if the plank has significant mass will the light person's end go down.

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Page 10

Chapter 9: Momentum

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Sample Questions

Q1) A 1200 kg cannon fires a 100.0 kg cannonball at 35 m/s.What is the recoil velocity of the cannon? Assume that frictional forces are negligible and the cannon is fired horizontally.

A)2.9 m/s

B)35 m/s

C)3.5 m/s

D)3.2 m/s

Q2) In the figure,determine the character of the collision.The masses of the blocks,and the velocities before and after are given.The collision is:

A)perfectly elastic.

B)partially inelastic.

C)completely inelastic.

D)not possible because momentum is not conserved.

Q3) In a collision between a light hydrogen molecule and a heavy water molecule,the momentum lost by one molecule is exactly the same as the momentum gained by the other molecule.

A)True

B)False

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Chapter 10: Energy and Work

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Sample Questions

Q1) A person drops one rock from rest and it falls 100 meters down a cliff before hitting the ground.The person then throws an identical rock downward.The amount of kinetic energy gained by the rock dropped from rest is _____ that of the second rock,and the magnitude of the change in speed (between hitting the ground and its initial speed)of the rock dropped from rest is _____ that of the second rock.

A)equal to,greater than B)equal to,equal to C)less than,less than D)equal to,less than

Q2) Two pendulums of equal length l = 0.45 m are suspended from the same point.The pendulum bobs are steel spheres.The first bob is drawn back to make a 35° angle with the vertical.If the first bob has mass 0.25 kg and the second has mass 0.85 kg,how high will the second bob rise above its initial position when struck elastically by the first bob after it is released?

A)1.7 cm

B)1.4 cm

C)2.0 cm

D)2.3 cm

Q3) Is energy conserved during a two-car collision?

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Page 12

Chapter 11: Using Energy

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Sample Questions

Q1) A heat engine operates between Tc = 294 K and Th = 450

K.What is the maximum possible efficiency?

A)0.35

B)0.65

C)0.53

D)1.53

Q2) A refrigerator with a COP of 3.7 cools to 9.0°C.What is the high temperature,Th,needed to operate the refrigerator at 9.0°C?

A)85°C

B)1052°C

C)11°C

D)42°C

Q3) A refrigerator increases the entropy of its hot reservoir at the same time as it decreases the entropy of its cold reservoir,but a heat engine does just the opposite.

A)True

B)False

Q4) Is liberating heat through combustion a reversible or an irreversible process?

Q5) Is temperature a macroscopic or a microscopic concept?

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Chapter 12: Thermal Properties of Matter

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Sample Questions

Q1) A hot air balloon has a volume of 2000 m3 when fully inflated,and the air inside the balloon is always at atmospheric pressure because of the large opening used to fill the balloon and heat the air inside it.What's the mass of hot air inside the balloon if its temperature is 120°C? (Assume a molecular weight of 28.8 g/mole for air. )

A)1790 kg

B)5850 kg

C)203 kg

D)62.0 kg

E)None of the above

Q2) Heat is added to a 2.0 kg piece of ice at a rate of 793.0 kW.How long will it take for the ice at 0.0ºC to melt? (For water Lf = 334 kJ/kg and Lv = 2257 kJ/kg. )

A)0.84 s

B)530,000 s

C)0.0 s

D)670 s

Q3) If a piece of metal has a hole in it and the metal is heated,how does the area of the hole change?

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Page 14

Chapter 13: Fluids

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Sample Questions

Q1) A 9.8 kg solid sphere,made of metal whose density is 3000 kg/m3,is suspended by a cord.The sphere floats when placed in a liquid of density 4200 kg m3.The fraction of the volume of the sphere that is submerged is closest to:

A)0.71

B)0.73

C)0.75

D)0.69

E)0.67

Q2) A compressed gas with a total mass of 203 kg is stored in a spherical container that has a radius of 0.521 m.What is the density of the compressed gas?

A)343 kg/m3

B)209 kg/m3

C)254 kg/m3

D)305 kg/m3

Q3) If you increase the pressure on the surface of a can of water,you will increase the buoyant force on objects placed in that water.

A)True

B)False

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Chapter 14: Oscillations

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Sample Questions

Q1) A 5.7 kg block attached to a spring executes simple harmonic motion on a frictionless horizontal surface.At time t = 0 s,the block has a displacement of -0.70 m,a velocity of -0.80 m/s,and an acceleration of +2.7 m/s2.The amplitude of the motion is closest to:

A)0.81 m

B)2.7 m

C)1.0 m

D)1.1 m

E)1.2 m

Q2) A 3.7 kg block on a horizontal frictionless surface is attached to a spring whose force constant is 450 N/m.The block is pulled from its equilibrium position at x = 0 m to a displacement x = +0.080 m and is released from rest.The block then executes simple harmonic motion along the x-axis (horizontal).The maximum elastic potential energy of the system is closest to:

A)1.4 J

B)1.3 J

C)1.6 J

D)1.7 J

E)1.8 J

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Page 16

Chapter 15: Traveling Waves and Sound

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Sample Questions

Q1) Transverse waves propagate at 43.2 m/s in a string that is subjected to a tension of 60.5 N.If the string is 15.9 m long,what is its mass?

A)0.515 kg

B)0.216 kg

C)0.366 kg

D)0.597 kg

Q2) A 4.24 m long,1.27 kg rope under a tension of 475 N oscillates with a frequency of 11.2 Hz.If the oscillation amplitude is 6.32 cm,how much energy is required to keep the rope oscillating for 5.52 s?

A)651 J

B)553 J

C)605 J

D)697 J

Q3) Which of the following increases when a sound becomes louder?

A)frequency

B)wavelength

C)amplitude

D)period

E)velocity

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Page 17

Chapter 16: Superposition and Standing Waves

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Sample Questions

Q1) The tension in each of two strings is adjusted so that both vibrate at exactly 666 Hz.The tension in one of the strings is then increased slightly.As a result,six beats per second are heard when both strings vibrate.What is the new frequency of the string that was tightened?

A)672 Hz

B)660 Hz

C)669 Hz

D)663 Hz

Q2) In the figure above,some wavefronts are emitted by a source of sound S.This picture can help us to understand

A)why the siren on a police car changes its pitch as it races past us.

B)why a sound grows quieter as we move away from the source.

C)how sonar works.

D)the phenomenon of beats.

E)why it is that our hearing is best near 3000 Hz.

Q3) A tube open at one end and closed at the other produces sound of fundamental frequency of 350 Hz.If you now open the closed end,the fundamental frequency becomes 175 Hz.

A)True

B)False

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Chapter 17: Wave Optics

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Sample Questions

Q1) A diffraction pattern of a single slit is compared to the diffraction pattern from a circular aperture of diameter r = w.Are they similar,equal?

Q2) The spacing of ruled lines on a diffraction grating is 1900 nm.The grating is illuminated at normal incidence with a parallel beam of white light in the 400 nm to 700 nm wavelength band.The angular width of the gap between the first order spectrum and the second order spectrum is closest to:

A)3.3°

B)4.3°

C)5.3°

D)6.3°

E)2.3°

Q3) What is the angular separation of two spectral lines of wavelengths 417 nm and 388 nm formed in order m = 2 with a 456 line/mm grating?

A)1.63°

B)1.52°

C)0°

Q4) Two identical gratings are put together to make one grating twice as wide.What condition must be fulfilled so that the resolution truly doubles?

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Page 19

Chapter 18: Ray Optics

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Sample Questions

Q1) A fish appears to be 2.00 m below the surface of a pond when viewed almost directly above by a fisherman.What is the actual depth of the fish? (nwater = 1.33)

A)2.66 m

B)0.67 m

C)1.5 m

D)0.38 m

Q2) Describe the operation of a one-way mirror.Is there actually such an optical element?

Q3) In Situation 18.1,a ray originating at O reaches a point on the brine-oil interface at the critical angle.The distance of this point from the axis is closest to:

A)1.5 m

B)1.7 m

C)1.9 m

D)2.1 m

E)2.3 m

Q4) What experiment could you quickly do to detect the difference between a real diamond and an identically shaped fake?

Q5) Why shouldn't you spray water on your roses at noon?

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Chapter 19: Optical Instruments

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Sample Questions

Q1) A machinist with normal vision has a near point at 25 cm.The machinist wears eyeglasses in order to do close work.The power of the lenses is + 4.25 diopters.With these eyeglasses,the near point of the machinist,in cm,is closest to:

A)12

B)10

C)7

D)15

E)17

Q2) In Situation 19.2,the distance between the object and the focal point of the objective,in mm,is closest to:

A)0.13

B)0.18

C)0.23

D)0.28

E)0.33

Q3) The intensity of light decreases as the f-number of a camera lens is increased.

A)True

B)False

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Chapter 20: Electric Fields and Forces

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Sample Questions

Q1) A 3.0 C positive charge is located at the origin and a 2.0 C positive charge is located at x = 0.0 m,y = 1.0 m.Find the point between them where the electric field strength is zero.

A)x = 0 m,y = 0.55 m

B)x = 0 m,y = 0.67 m

C)x = 0 m,y = 1.5 m

D)x = 0 m,y = 0.60 m

Q2) If one bag contains a charge 8Q and another one contains charge Q,the 8Q-bag exerts 8 times as much force on the Q-bag as the Q-bag exerts on the 8Q-bag.

A)True

B)False

Q3) What is the strength of an electric field that a 0.010 C negative charge experiences 0.90 mm from a 0.20 C positive charge? (The value of K is 9.0 × 109 N·m2/C2. )

A)2.2 × 1015 N/C

B)5.6 × 1016 N/C

C)1.1 × 1015 N/C

D)2.2 × 1016 N/C

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Chapter 21: Electric Potential

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Sample Questions

Q1) A 3.0 C point charge and a 9.0 C point charge are initially infinitely far apart.How much work does it take to bring the 3.0 C point charge to x = 3.0 mm,y = 0.0 mm,and the 9.0 C point charge to x = -3.0 mm,y = 0.0 mm? (The value of k is 9.0 \(\times\) 109 N·m2/C2. )

A)41 J

B)81 J

C)27 J

D)6.8 J

Q2) If an object is at zero potential,it must be uncharged.

A)True

B)False

Q3) A small object carries a charge of 10.0 C.If the object is so small that it can be regarded as a point charge,what is the energy density at a distance of 2.0 m from the charge? (The value of k is 9.0 \(\times\) 109 N·m2/C2. )

A)2.2 mJ/m3

B)4.5 mJ/m3

C)9.0 mJ/m3

D)18 mJ/m3

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Page 23

Chapter 22: Current and Resistance

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Q1) If you double the diameter of a cylindrical wire,you double its conductivity but reduce its resistivity by one half.

A)True

B)False

Q2) The resistivity of gold is 2.44 × 10-8 ·m at a temperature of 20°C.A gold wire,1.8 mm in diameter and 14 cm long,carries a current of 480 ma.The power dissipated in the wire is closest to:

A)0.31 mW

B)0.077 mW

C)0.14 mW

D)0.19 mW

E)0.25 mW

Q3) When current is flowing in a metal,the electrons are moving at nearly the speed of light.

A)True

B)False

Q4) Why is it that electrons rather than positive ions flow from a wire?

Q5) Where does the energy go that an electron has gained from the electric field when the electron passes through a conductor that has resistivity?

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Chapter 23: Circuits

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Q1) The potential across the terminals of a store-bought 1.5 V AAA battery always remains at 1.5 V unless the battery has gone dead.

A)True

B)False

Q2) A 1.0 F capacitor is charged until it acquires a potential difference of 700.0 V across its plates,then the emf source is removed.If the capacitor is then discharged through a 200.0 k resistance of a circuit,what is the voltage drop across the capacitor 7.0 ms later?

A)680 V

B)720 V

C)24 V

D)-25 V

Q3) Of voltmeters and ammeters,which is/are connected in series?

Q4) Why is it appropriate that electromotive force be measured in volts?

Q5) A circuit requires a 500 resistor,but all that is available are 1 k resistors.If the 1 k resistors are in abundant supply,how can they be combined to achieve the desired resistance?

Q6) Which will drain a battery faster,a circuit with a resistance of 10 k or a circuit with a resistance of 1 ?

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Chapter 24: Magnetic Fields and Forces

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Q1) Inside of an ideal solenoid,the closer you get to the metal windings,the stronger the magnetic field gets.

A)True

B)False

Q2) Consider a solenoid of length L,N windings,and radius b (L is much longer than b).A current I is flowing through the wire.If the radius of the solenoid were doubled (becoming 2b),and all other quantities remained the same,the magnetic field

A)would remain the same.

B)would become twice as strong. C)would become one half as strong.

Q3) A charged particle of mass 0.0040 kg is subjected to a 4.0 T magnetic field that acts at a right angle to its motion.If the particle moves in a circle of radius 0.10 m at a speed of 2.0 m/s,what is the magnitude of the charge on the particle?

A)0.020 C

B)50 C

C)0.00040 C

D)2500 C

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Chapter 25: Electromagnetic Induction and Electromagnetic Waves

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Q1) According to Lenz's law,the induced current in a circuit must flow in such a direction to oppose the flux through that circuit.

A)True

B)False

Q2) A 2.0 m conductor is formed into a square and placed in the horizontal xy-plane.A magnetic field is oriented 30.0º above the horizontal with a strength of 9.0 T.What is the magnetic flux through the conductor?

A)1.1 T m2

B)1.9 T m2

C)2.3 T m2

D)18 T m2

Q3) A 7.55 × 1014 Hz electromagnetic wave propagates in carbon tetrachloride with a speed of 2.05 × 108 m/s.The wavelength of the wave in carbon tetrachloride is closest to:

A)272 nm

B)301 nm

C)338 nm

D)361 nm

E)397 nm

Page 27

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Chapter 26: Ac Electricity

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Sample Questions

Q1) The reactance of a capacitor is 7.0 k at a frequency of 0.30 kHz.What is the capacitance?

A)0.076 F

B)0.48 F

C)3.0 F

D)0.107 F

Q2) In an AC circuit consisting of a resistor and capacitor in series with each other,the sum of the peak voltages across the resistor and across the capacitor must add up to the emf of the AC source.

A)True

B)False

Q3) Why is it not possible to have an LC circuit oscillate if the frequency of the signal constantly changes?

Q4) In a series RLC circuit,the current is largest at resonance.

A)True

B)False

Q5) A step-up transformer lowers current but raises voltage. A)True B)False

Q6) If a circuit doubles its peak voltage,what happens to its rms voltage?

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Chapter 27: Relativity

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Q1) In Situation 27.1,the momentum of the proton in kg m/s is closest to:

A)4.0 × 10-19

B)4.4 × 10-19

C)5.0 × 10-19

D)5.8 × 10-19

E)6.7 × 10-19

Q2) Adding heat to an object will increase its mass because the added heat energy is equivalent to mass.

A)True

B)False

Q3) If,in a certain reference frame,an object with no unbalanced forces on it keeps moving with constant velocity,then that frame must be an inertial reference frame.

A)True

B)False

Q4) The kinetic energy of an object moving at 10% the speed of light is

A)slightly higher than that given by (1/2)m v2.

B)slightly less than that given by (1/2)m v2.

C)exactly equal to (1/2)m v2.

Q5) Explain why it is impossible for an object to travel at the speed of light.

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Chapter 28: Quantum Physics

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Q1) An electron's de Broglie wavelength is 4.8 m.What is its speed?

A)1.5 × 102 m/s

B)1.3 × 105 m/s

C)8.3 × 102 m/s

D)4.2 × 106 m/s

Q2) An electron and a photon having the same wavelength will have the same energy.

A)True

B)False

Q3) A molecule of roughly spherical shape has a mass of 1.80 × 10-25 kg and a diameter of 0.6 nm.The uncertainty in the measured position of the molecule is equal to the molecular diameter.The minimum speed of the molecule is closest to:

A)1 m/s

B)10 m/s

C)100 m/s

D)0.1 m/s

E)0.01 m/s

Q4) A quantum of blue light carries more energy than a quantum of red light.

A)True

B)False

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Chapter 29: Atoms and Molecules

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Q1) Do all transitions (excluding fine and hyperfine transitions)that end up in the ground state of hydrogen give ultraviolet light? Why?

Q2) According to the Bohr model of the atom,an electron can only jump from a high to a low energy state if it emits a photon whose energy is the same as the energy difference between those two states.

A)True

B)False

Q3) Find the energy of the photon emitted when an electron drops from the n = 20 state to the n = 7 state in a hydrogen atom.

A)0.244 eV

B)0.263 eV

C)0.283 eV

D)0.302 eV

Q4) All atoms of a given element contain exactly the same number of protons in their nucleus,but they may have different numbers of neutrons.

A)True

B)False

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Chapter 30: Nuclear Physics

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Q1) A hospital patient has been given 131I (half-life = 8.04 days),which decays at 4.2 times the acceptable level for exposure to the general public.How long must the patient wait to reach the acceptable level? Assume that the material merely decays and is not excreted.

A)17 days

B)12 days

C)8.0 days

D)7.2 days

Q2) The material used in nuclear bombs is 239Pu,with a half-life of about 20,000 years.How long must we wait for a buried stockpile of this substance to decay to 4% of its original 239Pu mass?

A)93 thousand years

B)64 thousand years

C)45 thousand years

D)0.80000001 thousand years

Q3) The binding energy per nucleon increases steadily with the mass number of the nucleus.

A)True

B)False

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