Question 1

If the momentum of a particle is doubled,what happens to its de Broglie wavelength?

Accepted Answer

A)  it doubles 
B)  it halves 
C)  it slightly more than doubles 
D)  it becomes slightly less than half 
E)  it decreases by a factor of 2-1/2 
A)  it doubles 
B)  it halves 
C)  it slightly more than doubles 
D)  it becomes slightly less than half 
E)  it decreases by a factor of 2-1/2 B

Question 2

For the principle quantum number n = 4,how many values can the orbital quantum number have?

Accepted Answer

A)  9 
B)  5 
C)  4 
D)  3 
E)  32 
A)  9 
B)  5 
C)  4 
D)  3 
E)  32 C

Question 3

It is desired to use an electron microscope to study features in a virus that are about 0.25 nm.What accelerating voltage is needed for the electrons used in this microscope?

Accepted Answer

A)  96 V 
B)  48 V 
C)  24 V 
D)  5 V 
A)  96 V 
B)  48 V 
C)  24 V 
D)  5 V C

Question 4

The probability of finding a particle with wave function $\Psi$ in an interval $\Delta$x is given by

Accepted Answer

A)  $\Psi$. 
B)  $\Psi$ $\Delta$x. 
C)  $\Psi$ ($\Delta$x)2. 
D)  $\Psi$2 $\Delta$x. 
E)  $\Psi$2 ($\Delta$x)2. 
A)  $\Psi$. 
B)  $\Psi$ $\Delta$x. 
C)  $\Psi$ ($\Delta$x)2. 
D)  $\Psi$2 $\Delta$x. 
E)  $\Psi$2 ($\Delta$x)2.

Question 5

For a particle in a finite box,which of the following is not true?

Accepted Answer

A)  The energies are quantized for bound states. 
B)  The bound-state wave functions at the walls do not have to be zero. 
C)  The wave function can exist outside the walls. 
D)  There is the same number of bound states in a finite box as in a box with infinite walls. 
E)  None of these statements are true. 
A)  The energies are quantized for bound states. 
B)  The bound-state wave functions at the walls do not have to be zero. 
C)  The wave function can exist outside the walls. 
D)  There is the same number of bound states in a finite box as in a box with infinite walls. 
E)  None of these statements are true.

Question 6

If the orbital angular momentum quantum number is 3, how many values are possible for the orbital magnetic quantum number?

Accepted Answer

A)  9 
B)  7 
C)  5 
D)  4 
E)  3 
A)  9 
B)  7 
C)  5 
D)  4 
E)  3

Question 7

For the principle quantum number n = 5,what is the greatest number of values the spin quantum number can have?

Accepted Answer

A)  5 
B)  25 
C)  11 
D)  2 
E)  4 
A)  5 
B)  25 
C)  11 
D)  2 
E)  4

Question 8

The deBroglie wavelength for a particle indicates its

Accepted Answer

A)  position 
B)  momentum 
C)  mass 
D)  physical extent in space 
A)  position 
B)  momentum 
C)  mass 
D)  physical extent in space

Question 9

If an element has a band gap of 1 eV between a filled valence band and an empty conduction band,it would be classified as a(n)

Accepted Answer

A)  insulator. 
B)  conductor. 
C)  resistor. 
D)  semiconductor. 
E)  reactor. 
A)  insulator. 
B)  conductor. 
C)  resistor. 
D)  semiconductor. 
E)  reactor.

Question 10

According to the uncertainty principle,halving the uncertainty in position is accompanied by __________ the minimum uncertainty in momentum.

Accepted Answer

A)  halving 
B)  quartering 
C)  doubling 
D)  quadrupling 
E)  no change in 
A)  halving 
B)  quartering 
C)  doubling 
D)  quadrupling 
E)  no change in

Question 11

What is the orbital angular momentum quantum number for a d subshell?

Accepted Answer

A)  10 
B)  7 
C)  4 
D)  3 
E)  2 
A)  10 
B)  7 
C)  4 
D)  3 
E)  2

Question 12

How many states are in the n = 4 shell?

Accepted Answer

A)  4 
B)  9 
C)  16 
D)  18 
E)  32 
A)  4 
B)  9 
C)  16 
D)  18 
E)  32

Question 13

Which of the following experiments demonstrate the wave properties of light?

Accepted Answer

A)  photoelectric effect 
B)  Compton effect 
C)  diffraction effect 
D)  pair production 
A)  photoelectric effect 
B)  Compton effect 
C)  diffraction effect 
D)  pair production

Question 14

How do the energy level spacings change for a particle in a box when the box is made longer?

Accepted Answer

A)  decrease 
B)  stay the same 
C)  increase 
D)  halved 
A)  decrease 
B)  stay the same 
C)  increase 
D)  halved

Question 15

A baseball has a mass of 0.15 kg.If pitched at 40.0 m/s with a relative uncertainty of 1%,how uncertain is its position?

Accepted Answer

A)  9.1 $\times$ 10-34 m 
B)  5.7 $\times$ 10-34 m 
C)  1.8 $\times$ 10-34 m 
D)  6.3 $\times$ 10-33 m 
A)  9.1 $\times$ 10-34 m 
B)  5.7 $\times$ 10-34 m 
C)  1.8 $\times$ 10-34 m 
D)  6.3 $\times$ 10-33 m

Question 16

An electron and a neutron have the same de Broglie wavelength,therefore

Accepted Answer

A)  the electron and neutron have the same kinetic energy but the electron has the higher speed. 
B)  the electron has a lower speed and smaller kinetic energy. 
C)  the electron has higher kinetic energy and higher speed. 
D)  the electron has smaller kinetic energy and higher speed. 
A)  the electron and neutron have the same kinetic energy but the electron has the higher speed. 
B)  the electron has a lower speed and smaller kinetic energy. 
C)  the electron has higher kinetic energy and higher speed. 
D)  the electron has smaller kinetic energy and higher speed.

Question 17

If an electron is accelerated from rest through a potential difference of 100 V,what is its de Broglie wavelength?

Accepted Answer

A)  2.55 $\times$ 10-9 m 
B)  1.23 $\times$ 10-10 m 
C)  0.529 $\times$ 10-10 m 
D)  8.67 $\times$ 10-9 m 
E)  1.20 $\times$ 10-15 m 
A)  2.55 $\times$ 10-9 m 
B)  1.23 $\times$ 10-10 m 
C)  0.529 $\times$ 10-10 m 
D)  8.67 $\times$ 10-9 m 
E)  1.20 $\times$ 10-15 m

Question 18

Considering only the effect of diffraction,what is the smallest structure resolvable using a 12keV electron microscope?

Accepted Answer

A)  1.15 $\times$ 1011 m 
B)  1.23 $\times$ 1011 m 
C)  1.12 $\times$ 1011 m 
D)  1.14 $\times$ 1011 m 
A)  1.15 $\times$ 1011 m 
B)  1.23 $\times$ 1011 m 
C)  1.12 $\times$ 1011 m 
D)  1.14 $\times$ 1011 m

Question 19

The exclusion principle

Accepted Answer

A)  excludes electrons from atomic nuclei. 
B)  means that no two electrons in an atom can have the same orbit. 
C)  implies that in an atom no two electrons can have identical sets of quantum numbers. 
D)  excludes protons from electron orbits. 
A)  excludes electrons from atomic nuclei. 
B)  means that no two electrons in an atom can have the same orbit. 
C)  implies that in an atom no two electrons can have identical sets of quantum numbers. 
D)  excludes protons from electron orbits.

Question 20

To determine the state of the electron in the hydrogen atom requires _____ quantum number(s).

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
E)  5 
A)  1 
B)  2 
C)  3 
D)  4 
E)  5

Exam 28: Quantum Physics

If the momentum of a particle is doubled,what happens to its de Broglie wavelength?

For the principle quantum number n = 4,how many values can the orbital quantum number have?

It is desired to use an electron microscope to study features in a virus that are about 0.25 nm.What accelerating voltage is needed for the electrons used in this microscope?

The probability of finding a particle with wave function Ψ\PsiΨ in an interval Δ\DeltaΔ x is given by

For a particle in a finite box,which of the following is not true?

If the orbital angular momentum quantum number is 3, how many values are possible for the orbital magnetic quantum number?

For the principle quantum number n = 5,what is the greatest number of values the spin quantum number can have?

The deBroglie wavelength for a particle indicates its

If an element has a band gap of 1 eV between a filled valence band and an empty conduction band,it would be classified as a(n)

According to the uncertainty principle,halving the uncertainty in position is accompanied by __________ the minimum uncertainty in momentum.

What is the orbital angular momentum quantum number for a d subshell?

How many states are in the n = 4 shell?

Which of the following experiments demonstrate the wave properties of light?

How do the energy level spacings change for a particle in a box when the box is made longer?

A baseball has a mass of 0.15 kg.If pitched at 40.0 m/s with a relative uncertainty of 1%,how uncertain is its position?

An electron and a neutron have the same de Broglie wavelength,therefore

If an electron is accelerated from rest through a potential difference of 100 V,what is its de Broglie wavelength?

Considering only the effect of diffraction,what is the smallest structure resolvable using a 12keV electron microscope?

The exclusion principle

To determine the state of the electron in the hydrogen atom requires _____ quantum number(s).

Introduction

Force

Acceleration and Newtons Second Law of Motion

Motion With Constant Acceleration

Circular Motion

Conservation of Energy

Linear Momentum

Torque and Angular Momentum

Fluids

Elasticity and Oscillations

Waves

Sound

Temperature and the Ideal Gas

Heat

Thermodynamics

Electric Forces and Fields

Electric Potential

Electric Current and Circuits

Magnetic Forces and Fields

Electromagnetic Induction

Alternating Current

Electromagnetic Waves

Reflection and Refraction of Light

Optical Instruments

Interference and Diffraction

Relativity

Early Quantum Physics and the Photon

Nuclear Physics

Particle Physics

Filters

The probability of finding a particle with wave function $\Psi$ in an interval $\Delta$ x is given by