College Physics II Practice Exam - 1470 Verified Questions

College Physics II Practice Exam

Course Introduction

College Physics II is a continuation of introductory physics, focusing on electricity, magnetism, optics, and modern physics. This course explores fundamental concepts such as electric fields, electric potential, circuits, magnetic fields, electromagnetic induction, wave phenomena, and the behavior of light. Additionally, students are introduced to topics in atomic and nuclear physics. Emphasis is placed on problem-solving skills, conceptual understanding, and applications to real-world scenarios. Laboratory experiences complement the lectures, providing hands-on opportunities to investigate physical principles and refine scientific reasoning abilities.

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

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Chapter 1: Representing Motion

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Sample Questions

Q1) The following conversion equivalents are given:

1 m = 100 cm 1 in = 2.54 cm 1 ft = 12 in A bin has a volume of 1.5 m³.The volume of the bin,in ft³,is closest to:

A)35

B)41

C)47

D)53

E)59

Answer: D

Q2) A CD-ROM disk can store approximately 600.0 megabytes of information.If an average word requires 9.0 bytes of storage,how many words can be stored on one disk?

A)6.7 × 10⁷ words

B)5.4 × 10⁹ words

C)2.1 × 10⁷words

D)2.0 × 10⁹ words

Answer: A

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3

Chapter 2: Motion in One Dimension

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Q1) It is physically impossible for an object to have a negative acceleration and yet be speeding up.

A)True

B)False

Answer: False

Q2) A stone is thrown vertically upwards,reaches a highest point,and returns to the ground.When the stone is at the top of its path,its acceleration

A)is zero.

B)is directed upwards.

C)is directed downwards.

D)changes direction from upwards to downwards.

Answer: C

Q3) Which of the following situations is impossible?

A)An object has velocity directed east and acceleration directed west.

B)An object has velocity directed east and acceleration directed east.

C)An object has zero velocity but non-zero acceleration.

D)An object has constant non-zero acceleration and changing velocity.

E)An object has constant non-zero velocity and changing acceleration.

Answer: E

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Chapter 3: Vectors and Motion in Two Dimensions

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Sample Questions

Q1) You walk 55 m to the north,then turn 60° to your right and walk another 45 m.How far are you from where you originally started?

A)87 m

B)50 m

C)94 m

D)46 m

Answer: A

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) Are projectiles subject to constant acceleration in two dimensions?

Answer: Yes,they are subject to the constant acceleration (g)along the vertical.

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5

Chapter 4: Forces and Newtons Laws of Motion

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Q1) A bucket is being lowered by a rope with a constant downward acceleration.The tension in the rope must be equal to the weight of the bucket.

A)True

B)False

Q2) The engine of a 1250 kg car provides a forward directed force of 3651 N.If the car accelerates at a rate of 2.60 m/s²,what is the total resistive force (wind resistance,friction,etc. )acting on the car?

A)401 N

B)8600 N

C)2400 N

D)485 N

Q3) In order to get an object moving,you must push harder on it than it pushes back on you.

A)True

B)False

Q4) In outer space,an astronaut is working with two pieces of equipment that are outwardly identical.However,one of the objects has a slightly larger mass than the other.Since objects are weightless in space,how can the astronaut distinguish between the two objects?

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Chapter 5: Applying Newtons Laws

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Q1) A person with a mass of 78 kg is riding in an elevator that is accelerating upward at 1.80 m/s².What is the person's apparent weight? (Use g = 9.8 m/s². )

A)900 N

B)760 N

C)620 N

D)960 N

Q2) Dick and Jane stand on a platform of negligible weight,as shown in the figure.Dick weighs 500 N and Jane weighs 400 N.Jane is supporting some of her weight on the end of the rope she is holding.What is the downward force she is exerting on the platform? A)0

B)50 N

C)100 N

D)240 N

E)300 N

Q3) You are in a elevator which starts accelerating upward.Explain what happens to your apparent weight,and why.

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Chapter 6: Circular Motion,orbits,and Gravity

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Q1) Earth's gravity is caused by our planet's spin on its axis.

A)True

B)False

Q2) Satellites in orbit are accelerated toward Earth,so they must be getting closer and closer to our planet.

A)True

B)False

Q3) If you stood on a planet having a mass four times higher than Earth's mass,and a radius two times longer than Earth's radius,you would weigh

A)the same as you do on Earth.

B)two times more than you do on Earth.

C)two times less than you do on Earth.

D)four times more than you do on Earth.

Q4) Astronauts in orbiting satellites are weightless because they are so far from Earth that its gravitational pull is too weak to feel.

A)True

B)False

Q5) 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 solid disk of radius 1.60 m and mass 2.30 kg rolls without slipping to the bottom of an inclined plane.If the angular velocity of the disk is 4.27 rad/s at the bottom,what is the height of the inclined plane?

A)3.57 m

B)2.68 m

C)3.14 m

D)4.28 m

Q2) There must be equal amounts of mass on either side of the center of mass.

A)True

B)False

Q3) A force in the +y direction applied at the point x = 2.3 m,y = 1.4 m gives rise to a torque of 71 N · m about the origin.Find the magnitude of the force.

A)31 N

B)51 N

C)71 N

D)87 N

Q4) If two objects have the same moment of inertia,they must have the same mass.

A)True

B)False

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Chapter 8: Equilibrium and Elasticity

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Sample Questions

Q1) A steel wire,3.2 m long,has a diameter of 1.2 mm.The wire stretches 1.6 mm when it bears a load.Young's modulus for steel is 2.0 x 1011 n/m².The mass of the load is closest to:

A)12 kg

B)16 kg

C)20 kg

D)24 kg

E)28 kg

Q2) If the forces on an object balance,it does not necessarily follow that the torques balance.

A)True

B)False

Q3) Do all points on a rigid,rotating body have the same angular acceleration? Support your answer.

Q4) In the figure,the x-component of force F is closest to:

A)+19 N

B)+28 N

C)+32 N

D)-28 N

E)-32 N

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Chapter 9: Momentum

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Sample Questions

Q1) A fisherman throws the anchor off her boat at an angle of 3.0° above the horizontal.If the anchor weighs 2.0 times as much as she does and the boat moves with speed 2.7 m/s during the launch,how fast did she throw the anchor? (Solve for her frame of reference.Assume the mass of the boat is negligible. )

A)4.1 m/s

B)1.4 m/s

C)4.0 m/s

D)1.3 m/s

Q2) A 1120 kg car experiences an impulse of 30,000.0 N · s during a collision with a wall.If the collision takes 0.43 s,what was the velocity of the car just before the collision?

A)27 m/s

B)12 m/s

C)63 m/s

D)22 m/s

Q3) As a tile falls from the roof of a building to the ground its momentum is conserved.

A)True

B)False

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Chapter 10: Energy and Work

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Sample Questions

Q1) You do 174 J of work while pulling your sister back on a swing,whose chain is 5.10 m long,until the swing makes an angle of 32.0° with the vertical.What is your sister's mass?

A)22.9 kg

B)19.5 kg

C)26.3 kg

D)28.4 kg

Q2) You push a heavy box of mass m up a frictionless inclined plane of length l and height h in some time t₀.Later,you push the same box up a similar inclined plane of length l/2 and height h in the same time t₀.What can you say about the relationship between your power output(s)during these two processes? Assume the box is moved at a constant velocity in both cases.

Q3) A pendulum in a grandfather clock swings back and forth.Does the force of gravity do positive work on the pendulum at any point in its trajectory? If so,where?

Q4) If one lifts a box and walks up a couple of floors,how would the change in potential energy be accounted for?

Q5) 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) As you increase the difference between the temperatures of the hot and cold reservoirs,a Carnot engine converts a larger and larger percent of the heat put into it into work.

A)True

B)False

Q2) Water turns to ice when it is placed in a freezer.During this process,the entropy of this water has decreased.

A)True

B)False

Q3) A heat engine that is 40% efficient and has a heat input of 200 J per cycle at the hot reservoir will waste 80 J of heat each cycle.

A)True

B)False

Q4) Heat can be transformed into work with 100% efficiency,but work cannot be transformed into heat with 100% efficiency.

A)True

B)False

Q5) Is liberating heat through combustion a reversible or an irreversible process?

Q6) Is temperature a macroscopic or a microscopic concept?

Page 13

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Chapter 12: Thermal Properties of Matter

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Sample Questions

Q1) If two different gases are at the same temperature,the root mean square speed of their molecules must be the same for both of them.

A)True

B)False

Q2) A constant-volume gas thermometer is filled with air whose pressure is 104 Pa at the triple point of water.What would the pressure be at 32.0 K?

A)12.2 Pa

B)1.13 × 10^-3 Pa

C)888 Pa

D)84.1 Pa

Q3) An ideal gas inside box A of volume V has a temperature T and contains N molecules.An ideal gas inside box B of volume V/2 has a temperature T/2,and also contains N molecules.In which box is the pressure the highest?

A)Box A

B)Box B

C)The pressure is the same in both boxes.

Q4) What measures the average kinetic energy associated with random translational motion of molecules?

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Page 14

Chapter 13: Fluids

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Sample Questions

Q1) 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

Q2) A tank of water at rest is 2.0000 m deep.It is then accelerated at 5.0000 m/s²parallel to the original water surface,so that the front edge of the water in the tank is lowered to 1/2 its original value.What is the water pressure in the tank at the bottom back edge?

A)29,430.0013 N/m²

B)9 N/m²

C)9810.00042 N/m²

D)The length of the tank is needed.

Q3) If a uniform sphere is compressed to half of its original diameter,its mass remains the same but its density becomes 8 times as great.

A)True

B)False

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Chapter 14: Oscillations

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Sample Questions

Q1) A 56.0 kg bungee jumper jumps off a bridge and undergoes simple harmonic motion.If the period of oscillation is 11.2 s,what is the spring constant of the bungee cord?

A)17.6 N/m

B)21.1 N/m

C)28.2 N/m

Q2) The wheels on a particular moving car rotate 486 times per minute.Find the rotational period of the tires.

A)0.123 s

B)0.002 s

C)0.148 s

D)0.172 s

Q3) An object undergoing simple harmonic motion has an amplitude of 2.3 m.If the maximum velocity of the object is 10 m/s,what is the object's angular frequency?

A)4.4 rad/s

B)4.8 rad/s

C)3.5 rad/s

D)4.0 rad/s

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Chapter 15: Traveling Waves and Sound

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Sample Questions

Q1) Crests of an ocean wave pass a pier every 12.0 s.If the waves are moving at 5.6 m/s,what is the wavelength of the ocean waves?

A)67 m

B)34 m

C)77 m

D)57 m

Q2) The howler monkey is the loudest land animal and can be heard up to a distance of 9.8 km.Assume the acoustic output of a howler to be uniform in all directions.The distance at which the intensity level of a howler's call is 25 dB,in SI units,is closest to:

A)550

B)660

C)830

D)940

E)1100

Q3) If a rocket is traveling toward a mountain at 1/2 the speed of sound,the sound waves from this rocket's engine approach the mountain at 1 1/2 times the speed of sound.

A)True

B)False

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Chapter 16: Superposition and Standing Waves

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Q1) A 0.335 m string is clamped at both ends.If the lowest standing wave frequency in the string is 326 Hz,what is the wave speed?

A)218 m/s

B)270 m/s

C)331 m/s

D)412 m/s

Q2) The sound from two loudspeakers is received by a microphone at a point far away along the line through the speakers.The microphone registers maximum intensity when the speakers are 20 cm apart.The sound intensity decreases as the distance between the speakers is increased,reaching zero at a separation of 91 cm.If the distance between the speakers continues to increase,at what separation will the sound intensity again be a maximum?

A)162 cm

B)172 cm

C)182 cm

D)192 cm

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18

Chapter 17: Wave Optics

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Q1) A 17 mm wide diffraction grating has rulings of 530 lines per mm.Light is incident normally on the grating.The longest wavelength that forms an intensity maximum in the fifth order is closest to:

A)377 nm

B)352 nm

C)402 nm

D)427 nm

E)452 nm

Q2) Red and blue light pass through a double slit and fall on a distant screen.The bright spots of red light will be farther from the center than the blue bright spots.

A)True

B)False

Q3) Two identical gratings are put together to make one grating twice as wide.What condition must be fulfilled so that the resolution truly doubles?

Q4) Explain what you see when you squeeze your eyes almost shut while looking at a small light source far away in a dark room.

Q5) What is the difference between diffraction and interference?

Q6) How wide is a single slit that gives its first minimum at 90°?

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Chapter 18: Ray Optics

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Q1) Light having a frequency in vacuum of 6.0 × 10¹⁴ Hz enters a liquid of refractive index 2.0.In this liquid,its frequency will be:

A)12 × 10¹⁴ Hz

B)6.0 × 10¹⁴ Hz

C)3.0 × 10¹⁴ Hz

D)1.5 × 10¹⁴ Hz

E)None of the above choices are correct.

Q2) In Situation 18.1,a ray originating at O,crosses the brine-oil interface at a point 0.60 m from the axis.The ray continues and emerges into the air.The angle that the ray in the air makes with the vertical is closest to:

A)48°

B)51°

C)54°

D)57°

E)60°

Q3) You move a lens from your eye to arm's length away and a far scene never becomes inverted.What can you say about the focal length?

Q4) Why shouldn't you spray water on your roses at noon?

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Page 20

Chapter 19: Optical Instruments

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Q1) As a treatment for cataracts (a cloudiness of the lens of the eye),the natural lens is removed and a plastic lens is implanted.After this is done a person can see distant objects clearly,but he cannot accommodate to focus on nearby objects.If for example such a person wanted to read a book at a distance of 25 cm,he would have to wear eyeglasses whose diopter power was approximately

A)+2.78 diopters.

B)+3.33 diopters.

C)-1.78 diopters.

D)+4.00 diopters.

E)-4.00 diopters.

Q2) A lens of focal length 45 mm is used as a magnifier.The object being viewed is 6.8 mm long,and is positioned at the focal point of the lens.The lens is moved closer to the object,so that the image is now 25 cm from the lens.The distance the lens has been moved,in cm,is closest to:

A)0.69

B)0.76

C)0.62

D)0.55

E)0.48

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Page 21

Chapter 20: Electric Fields and Forces

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Q1) A point charge Q = -12 C,and two other charges,q₁ and q₂,are placed as shown.The electric force components on charge Q are F_x = +0.005 N and F_y = -0.003 N.In the figure,the number of excess electrons in charge Q is closest to:

A)5.5 × 10¹³

B)6.5 × 10¹³

C)7.5 × 10¹³

D)8.5 × 10¹³

E)9.5 × 10¹³

Q2) Three charges of magnitude 3.0 \(\times\) 10^-4 C each are located at x = 1.0 m,y = 1.0 m,at s = 0.0 m,y = 0.0 m,and at x = -1.0 m,y = 0.0 m.The one in the middle is negative,while the other two are positive.What is the net Coulombic force exerted by them on a negative 3.0 \(\times\) 10^-5 C charge located at x = 0.0 m,y = 2.0 m? (The value of k is 9.0 × 10⁹ N·m²/C². )

A)87 N attractive

B)87 N repulsive

C)120 N attractive

D)120 N repulsive

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Chapter 21: Electric Potential

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Q1) Two parallel plates that are initially uncharged are separated by 1.2 mm.What charge must be transferred from one plate to the other if 11.0 kJ of energy are to be stored in the plates? The area of each plate is 19.0 mm².

A)56 C

B)39 C

C)78 C

D)3.5 mC

Q2) If the voltage at a point in space is zero,then the electric field must be A)negative.

B)zero.

C)uniform.

D)positive.

E)Impossible to determine based on the information given.

Q3) Two conductors are joined by a long copper wire.Thus

A)each conductor carries the same free charge.

B)each conductor must be at the same potential.

C)the electric field at the surface of each conductor is the same.

D)no free charge can be present on either conductor.

E)the potential on the wire is the average of the potential of each conductor.

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Page 23

Chapter 22: Current and Resistance

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Q1) If the length and diameter of a wire of circular cross section are both doubled,the resistance is

A)unchanged.

B)doubled.

C)increased fourfold.

D)halved.

E)None of these are true.

Q2) As current flows through a uniform wire,the wire gets hotter because the electrons slow down and therefore transform their lost kinetic energy into thermal energy in the wire.

A)True

B)False

Q3) A current flowing through a copper wire (which is connected to a battery)is due to A)electrons being accelerated by an electric field.

B)positively charged particles being pushed off the battery terminal.

C)electrons being bumped by positively charged particles.

D)positively charged particles being attracted to the negative terminal of a battery.

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

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24

Chapter 23: Circuits

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Q1) A resistor is made out of a low wire having a length L.Each end of the wire is attached to a terminal of a battery having a constant voltage Vo.A current I flows through the wire.If the wire were cut in half,making two wires of length L/2,and both wires were attached to the battery (the end of both wires attached to one terminal,and the other ends attached to the other terminal),what would be the total current flowing through the two wires?

A)4I

B)2I

C)I

D)I/2

Q2) 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

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

Q4) 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?

Q5) Why is it appropriate that electromotive force be measured in volts?

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Chapter 24: Magnetic Fields and Forces

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Q1) In the figure,the deuterons are in circular orbit in the magnetic field.The radius of the orbit and the initial sense of deflection are closest to:

A)60 mm,upward

B)70 mm,upward

C)60 mm,downward

D)70 mm,downward

E)80 mm,downward

Q2) The magnitude of a magnetic field a distance 3.0 µm from a wire is 20.0 × 10^-4 T.How much current is flowing through the wire? Assume the wire is the only contributor to the magnetic field.

A)30 mA

B)188 mA

C)19 mA

D)377 mA

Q3) Two long,parallel bars carry equal currents in opposite directions.The magnetic fields due to these two currents cancel each other midway between the two bars.

A)True

B)False

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Chapter 25: Electromagnetic Induction and Electromagnetic Waves

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Q1) A 1.90 × 10¹⁴ Hz electromagnetic wave propagates in carbon tetrachloride with a speed of 2.05 × 10⁸ m/s.The wavelength of the wave in vacuum is closest to:

A)1580 nm

B)1080 nm

C)1260 nm

D)1420 nm

E)1740 nm

Q2) 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

Q3) For electromagnetic waves,the electric and magnetic fields are often given in the form of sine waves.Explain how this model of electromagnetic waves does not violate the conservation of energy,especially when the sine functions are zero.

Page 27

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Chapter 26: Ac Electricity

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Q1) In an oscillating LC circuit,larger values of L and C give rise to an oscillation with a higher frequency.

A)True B)False

Q2) Just as a 100 resistor always has the same resistance no matter what circuit it is in,likewise a 50 F capacitor always has the same reactance no matter what circuit it is in.

A)True B)False

Q3) The AC current through a capacitor lags the capacitor voltage by 90°.

A)True B)False

Q4) An LC circuit has a resonance frequency of 9.0 kHz.If the inductor in the circuit has a value of 8.0 H,what is the capacitance of the circuit?

A)0.04 pF

B)39 pF

C)1.5 pF

D)4.4 pF

Q5) 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) Astronaut Spud Nick is space-travelling from planet X to planet Y at a speed of 0.60 c.When he is precisely halfway between the planets,a distance of 1 light-hour from each,nuclear devices are detonated.The explosions are simultaneous in the frame of the planets.What is the difference in time of arrival of the flashes from the explosions as observed by Spud?

A)300 min

B)150 min

C)75 min

D)0 min

Q2) An electron has a speed of 0.643 c.Through what potential difference would the electron need to be accelerated in order to reach this speed? Assume that the electron was initially at rest.

A)160 kV

B)130 kV

C)180 kV

D)200 kV

Q3) Explain why it is impossible for an object to travel at the speed of light.

Q4) The rest mass of a particle depends upon how fast it is moving.

A)True

B)False

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Chapter 28: Quantum Physics

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66 Verified Questions

66 Flashcards

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Sample Questions

Q1) A photocathode has a work function of 2.4 eV.The photocathode is illuminated with monochromatic radiation whose photon energy is 3.4 eV.The maximum kinetic energy of the photoelectrons produced is closest to:

A)1.6 × 10^-19 J

B)3.8 × 10^-19J

C)4.4 × 10^-19 J

D)4.9 × 10^-19 J

E)5.4 × 10^-19 J

Q2) A photocathode whose work function is 2.5 eV is illuminated with white light that has a continuous wavelength band from 360 nm to 700 nm.The stopping potential for this white light illumination is closest to:

A)0.94 V

B)0.85 V

C)1.0 V

D)1.1 V

E)1.2 V

Q3) Illuminating a particular metal surface with a helium-neon laser results in the emission of photoelectrons.Will the kinetic energy of the photoelectrons increase if you increase the laser's power? Support your answer.

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Page 30

Chapter 29: Atoms and Molecules

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48 Verified Questions

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Sample Questions

Q1) It is impossible for an electron to lose its spin angular momentum.

A)True

B)False

Q2) An electron and a proton are both moving such that their kinetic energy is roughly 100 eV.How do the speeds of the particles compare?

A)The electron is moving about 30 times faster than the proton.

B)The electron is moving about 1000 times faster than the proton.

C)The electron and proton are moving about the same speed.

D)The proton is moving about 30 times faster than the electron.

Q3) What is the wavelength of the light emitted by atomic Hydrogen according to Balmer's formula with m = 3 and n = 8?

A)955 nm

B)389 nm

C)1950 nm

D)384 nm

Q4) Do all transitions (excluding fine and hyperfine transitions)that end up in the ground state of hydrogen give ultraviolet light? Why?

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Chapter 30: Nuclear Physics

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48 Verified Questions

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Sample Questions

Q1) The half-life of cobalt-60 is 5.3 years,while that of strontium-90 is 28 years.Suppose you have a sample of each,such that they initially contain equal numbers of atoms of these nuclides.How will the activities (number of decays per unit time)of the samples compare?

A)The activity of the cobalt-60 sample will be greater.

B)The activities cannot be compared without more information.

C)The activities will be equal.

D)The activity of the strontium-90 sample will be greater.

Q2) In massive stars,three helium atoms fuse together,forming a carbon nucleus.This reaction heats the core of the star.The net mass of the three helium nuclei must therefore be

A)higher than that of the carbon nucleus.

B)less than that of the carbon nucleus.

C)the same as that of the carbon nucleus (mass is always conserved).

Q3) The majority of known nuclei are stable.

A)True

B)False

Q4) Stable nuclei have equal numbers of protons and neutrons.

A)True

B)False

Page 32

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