Question 1

As you walk away from a vertical plane mirror,your image in the mirror

Accepted Answer

A)  is always the same height. 
B)  may or may not decrease in height, depending on where the observer is positioned. 
C)  is always a real image, no matter how far you are from the mirror. 
D)  changes from being a virtual image to a real image as you pass the focal point. 
E)  decreases in height. 
A)  is always the same height. 
B)  may or may not decrease in height, depending on where the observer is positioned. 
C)  is always a real image, no matter how far you are from the mirror. 
D)  changes from being a virtual image to a real image as you pass the focal point. 
E)  decreases in height.

Question 2

Calculate the kinetic energy (in eV)of a nonrelativistic neutron that has a de Broglie wavelength of
9.9 × 10-12 m.(h = 6.626 × 10-34 J • s,mneutron = 1.675 × 10-27 kg,1 eV = 1.60 × 10-19 J)

Accepted Answer

Question 3

A 2.0-m long conducting wire is formed into a square and placed in the horizontal xy-plane.A uniform magnetic field is oriented 30.0° above the horizontal with a strength of 9.0 T.What is the magnetic flux through the square?

Accepted Answer

A)  1.1 T • m2 
B)  1.9 T • m2 
C)  2.3 T • m2 
D)  18 T • m2 
A)  1.1 T • m2 
B)  1.9 T • m2 
C)  2.3 T • m2 
D)  18 T • m2

Question 4

An extremely long thin wire carries a uniform linear charge density of 358 nC/m.Find the potential difference between points 5.0 m and 6.0 m from the wire,provided they are not near either end of the wire.(k = 1/4πε0 = 8.99 × 109 N • m2/C2)

Accepted Answer

A)  1.2 kV 
B)  6.0 kV 
C)  0.21 kV 
D)  0.215 kV 
A)  1.2 kV 
B)  6.0 kV 
C)  0.21 kV 
D)  0.215 kV

Question 5

A box of mass m is pressed against (but is not attached to)an ideal spring of force constant k and negligible mass,compressing the spring a distance x.After it is released,the box slides up a frictionless incline as shown in the figure and eventually stops.If we repeat this experiment but instead use a spring having force constant 2k

Accepted Answer

A)  the box will go up the incline twice as high as before. 
B)  just as it moves free of the spring, the kinetic energy of the box will be twice as great as before. 
C)  just as it moves free of the spring, the speed of the box will be   times as great as before. 
D)  All of the above choices are correct. 
E)  None of the above choices is correct. 
A)  the box will go up the incline twice as high as before. 
B)  just as it moves free of the spring, the kinetic energy of the box will be twice as great as before. 
C)  just as it moves free of the spring, the speed of the box will be   times as great as before. 
D)  All of the above choices are correct. 
E)  None of the above choices is correct.

Question 6

Two point charges,Q and -3Q,are located on the x-axis a distance d apart,with -3Q to the right of Q.Find the location of ALL the points on the x-axis (not counting infinity)at which the potential (relative to infinity)due to this pair of charges is equal to zero.

Accepted Answer

d/4 to the right of

Question 7

In their common rest frame,two stars are 90.0 light-years (ly)apart.If they are 12.0 ly apart as measured by the navigator in a spaceship traveling between them,how fast is the spaceship moving? Express your answer in terms of c.

Accepted Answer

A)  0.991c 
B)  0.986c 
C)  0.980c 
D)  0.972c 
A)  0.991c 
B)  0.986c 
C)  0.980c 
D)  0.972c

Question 8

A narrow copper wire of length L and radius b is attached to a wide copper wire of length L and radius 2b,forming one long wire of length 2L.This long wire is attached to a battery,and a current is flowing through it.If the electric field in the narrow wire is E,the electric field in the wide wire is

Accepted Answer

A)  E. 
B)  2E. 
C)  4E. 
D)  E/2. 
E)  E/4. 
A)  E. 
B)  2E. 
C)  4E. 
D)  E/2. 
E)  E/4.

Question 9

A wire has a cross-sectional area of 0.10 mm2.If there are 4.0 × 1028 atoms per cubic meter in this wire,and if each atom contributes 2 free electrons,what is the drift velocity of the electrons when the current in the wire is 6.0 A? (e = 1.60 × 10-19C)

Accepted Answer

A)  0.0047 m/s 
B)  0.0092 m/s 
C)  0.94 m/s 
D)  0.019 m/s 
A)  0.0047 m/s 
B)  0.0092 m/s 
C)  0.94 m/s 
D)  0.019 m/s

Question 10

When a gas undergoes an isothermal process,there is

Accepted Answer

A)  no change in the pressure of the gas. 
B)  no change in the temperature of the gas. 
C)  no change in the volume of the gas. 
D)  no work done by (or on) the gas. 
E)  no heat added to the gas. 
A)  no change in the pressure of the gas. 
B)  no change in the temperature of the gas. 
C)  no change in the volume of the gas. 
D)  no work done by (or on) the gas. 
E)  no heat added to the gas.

Question 11

A string is wrapped around a pulley with a radius of 2.0 cm and no appreciable friction in its axle.The pulley is initially not turning.A constant force of 50 N is applied to the string,which does not slip,causing the pulley to rotate and the string to unwind.If the string unwinds 1.2 m in 4.9 s,what is the moment of inertia of the pulley?

Accepted Answer

A)  0.17 kg • m2 
B)  17 kg • m2 
C)  14 kg • m2 
D)  0.20 kg • m2 
E)  0.017 kg • m2 
A)  0.17 kg • m2 
B)  17 kg • m2 
C)  14 kg • m2 
D)  0.20 kg • m2 
E)  0.017 kg • m2

Question 12

For the vectors shown in the figure,find the magnitude and direction of the vector product   ×  
,assuming that the quantities shown are accurate to two significant figures.

Accepted Answer

A)  16, directed into the plane 
B)  16, directed out of the plane 
C)  45, directed on the plane 
D)  45, directed into the plane 
E)  45, directed out of the plane 
A)  16, directed into the plane 
B)  16, directed out of the plane 
C)  45, directed on the plane 
D)  45, directed into the plane 
E)  45, directed out of the plane

Question 13

A parallel-plate capacitor consists of two parallel,square plates that have dimensions 1.0 cm by 1.0 cm.If the plates are separated by 1.0 mm,and the space between them is filled with teflon,what is the capacitance of this capacitor? (The dielectric constant for teflon is 2.1,and ε0 = 8.85 × 10-12 C2/N • m2.)

Accepted Answer

A)  1.9 pF 
B)  0.44 pF 
C)  2.1 pF 
D)  0.89 pF 
A)  1.9 pF 
B)  0.44 pF 
C)  2.1 pF 
D)  0.89 pF

Question 14

A rigid rectangular loop,which measures 0.30 m by 0.40 m,carries a current of 5.5 A,as shown in the figure.A uniform external magnetic field of magnitude 2.9 T in the negative x direction is present.Segment CD is in the xz-plane and forms a 35° angle with the z-axis,as shown.Find the magnitude of the external torque needed to keep the loop in static equilibrium.

Accepted Answer

A)  1.1 N • m 
B)  0.73 N • m 
C)  1.3 N • m 
D)  1.4 N • m 
E)  1.6 N • m 
A)  1.1 N • m 
B)  0.73 N • m 
C)  1.3 N • m 
D)  1.4 N • m 
E)  1.6 N • m

Question 15

Suppose that the build-up of fatty tissue on the wall of an artery decreased the radius by 10%.By what percent would the arterial pressure difference produced by the heart have to be increased to maintain a constant blood flow?

Accepted Answer

A)  48% 
B)  52% 
C)  50% 
D)  46% 
E)  54% 
A)  48% 
B)  52% 
C)  50% 
D)  46% 
E)  54%

Question 16

If the fifth order minimum in the diffraction pattern of a thin slit is at 40° from the central maximum,what is the highest order minimum in the pattern?

Accepted Answer

A)  6 
B)  11 
C)  8 
D)  7 
E)  9 
A)  6 
B)  11 
C)  8 
D)  7 
E)  9

Question 17

A box of mass 50 kg is at rest on a horizontal frictionless surface.A constant horizontal force F then acts on the box and accelerates it to the right.It is observed that it takes the box 6.9 seconds to travel 28 meters.What is the magnitude of the force?

Accepted Answer

The answer of A box of mass 50 kg is...

Question 18

What is the magnitude of   +  
+  
,where  
= 1)00  
+ 4)00  
- 1)00   ,  
= 3)00  
- 1)00  
- 4)00  
And  
= -1.00  
+ 1)00  
?

Accepted Answer

A)  7.07 
B)  2.00 
C)  10.76 
D)  6.78 
E)  8.12 
A)  7.07 
B)  2.00 
C)  10.76 
D)  6.78 
E)  8.12

Question 19

A Carnot air conditioner operates between an indoor temperature of 20°C and an outdoor temperature of 39°C.How much energy does it need to remove 2000 J of heat from the interior of the house?

Accepted Answer

A)  105 J 
B)  130 J 
C)  780 J 
D)  520 J 
E)  340 J 
A)  105 J 
B)  130 J 
C)  780 J 
D)  520 J 
E)  340 J

Question 20

A series circuit consists of ac source,a 90-Ω resistor,a 0.80-H inductor,and an 80-μF capacitor.The frequency of the source is adjusted so that the capacitive reactance is equal to twice the inductive reactance.What is the frequency of the source?

Accepted Answer

A)  14 Hz 
B)  13 Hz 
C)  16 Hz 
D)  17 Hz 
E)  19 Hz 
A)  14 Hz 
B)  13 Hz 
C)  16 Hz 
D)  17 Hz 
E)  19 Hz

Exam 1: A: Foundations

As you walk away from a vertical plane mirror,your image in the mirror

Calculate the kinetic energy (in eV)of a nonrelativistic neutron that has a de Broglie wavelength of 9.9 × 10-12 m.(h = 6.626 × 10-34 J • s,mneutron = 1.675 × 10-27 kg,1 eV = 1.60 × 10-19 J)

A 2.0-m long conducting wire is formed into a square and placed in the horizontal xy-plane.A uniform magnetic field is oriented 30.0° above the horizontal with a strength of 9.0 T.What is the magnetic flux through the square?

An extremely long thin wire carries a uniform linear charge density of 358 nC/m.Find the potential difference between points 5.0 m and 6.0 m from the wire,provided they are not near either end of the wire.(k = 1/4πε0 = 8.99 × 109 N • m2/C2)

Two point charges,Q and -3Q,are located on the x-axis a distance d apart,with -3Q to the right of Q.Find the location of ALL the points on the x-axis (not counting infinity)at which the potential (relative to infinity)due to this pair of charges is equal to zero.

In their common rest frame,two stars are 90.0 light-years (ly)apart.If they are 12.0 ly apart as measured by the navigator in a spaceship traveling between them,how fast is the spaceship moving? Express your answer in terms of c.

A wire has a cross-sectional area of 0.10 mm2.If there are 4.0 × 1028 atoms per cubic meter in this wire,and if each atom contributes 2 free electrons,what is the drift velocity of the electrons when the current in the wire is 6.0 A? (e = 1.60 × 10-19C)

When a gas undergoes an isothermal process,there is

For the vectors shown in the figure,find the magnitude and direction of the vector product × ,assuming that the quantities shown are accurate to two significant figures.

Suppose that the build-up of fatty tissue on the wall of an artery decreased the radius by 10%.By what percent would the arterial pressure difference produced by the heart have to be increased to maintain a constant blood flow?

If the fifth order minimum in the diffraction pattern of a thin slit is at 40° from the central maximum,what is the highest order minimum in the pattern?

A box of mass 50 kg is at rest on a horizontal frictionless surface.A constant horizontal force F then acts on the box and accelerates it to the right.It is observed that it takes the box 6.9 seconds to travel 28 meters.What is the magnitude of the force?

What is the magnitude of + + ,where = 1)00 + 4)00 - 1)00 , = 3)00 - 1)00 - 4)00 And = -1.00 + 1)00 ?

A Carnot air conditioner operates between an indoor temperature of 20°C and an outdoor temperature of 39°C.How much energy does it need to remove 2000 J of heat from the interior of the house?

A series circuit consists of ac source,a 90-Ω resistor,a 0.80-H inductor,and an 80-μF capacitor.The frequency of the source is adjusted so that the capacitive reactance is equal to twice the inductive reactance.What is the frequency of the source?

Foundations

Motion in One Dimension

Acceleration

Momentum

Energy

Principle of Relativity

Interactions

Force

Work

Motion in a Plane

Motion in a Circle

Torque

Gravity

Special Relativity

Periodic Motion

Waves in One Dimension

Waves in Two and Three Dimensions

Fluids

Entropy

Energy Transferred Thermally

Degradation of Energy

Electric Interactions

The Electric Field

Gausss Law

Work and Energy in Electrostatics

Charge Separation and Storage

Magnetic Interactions

Magnetic Fields of Charged Particles in Motion

Changing Magnetic Fields

Changing Electric Fields

Electric Circuits

Electronics

Ray Optics

Wave and Particle Optics

Filters

Calculate the kinetic energy (in eV)of a nonrelativistic neutron that has a de Broglie wavelength of 9.9 × 10^-12 m.(h = 6.626 × 10^-34 J • s,m_neutron = 1.675 × 10^-27 kg,1 eV = 1.60 × 10^-19 J)

An extremely long thin wire carries a uniform linear charge density of 358 nC/m.Find the potential difference between points 5.0 m and 6.0 m from the wire,provided they are not near either end of the wire.(k = 1/4πε₀ = 8.99 × 10⁹ N • m²/C²)

A wire has a cross-sectional area of 0.10 mm².If there are 4.0 × 10²⁸ atoms per cubic meter in this wire,and if each atom contributes 2 free electrons,what is the drift velocity of the electrons when the current in the wire is 6.0 A? (e = 1.60 × 10^-19C)