Question 1

The base of an npn bipolar transistor is made of

Accepted Answer

A)  p-type material. 
B)  n-type material. 
C)  both n- and p-type material. 
D)  pure silicon. 
A)  p-type material. 
B)  n-type material. 
C)  both n- and p-type material. 
D)  pure silicon. A

Question 2

The magnetic quantum number, m, can be related to

Accepted Answer

A)  the total energy of the state. 
B)  the magnitude of the orbital angular momentum. 
C)  the z component of the orbital angular momentum. 
D)  the z component of the spin angular momentum. 
A)  the total energy of the state. 
B)  the magnitude of the orbital angular momentum. 
C)  the z component of the orbital angular momentum. 
D)  the z component of the spin angular momentum. C

Question 3

The rotational energy level of the HCl molecule is $4.14 \times 10 ^ { - 22 } \mathrm {~J}$ when J = 1. The amount of energy it must absorb to go to level J = 3 is

Accepted Answer

A)  $4.14 \times 10 ^ { - 22 } \mathrm {~J}$ 
B)  $8.28 \times 10 ^ { - 22 } \mathrm {~J}$ 
C)  $12.4 \times 10 ^ { - 22 } \mathrm {~J}$ 
D)  $20.7 \times 10 ^ { - 22 } \mathrm {~J}$ 
E)  $37.3 \times 10 ^ { - 22 } \mathrm {~J}$ 
A)  $4.14 \times 10 ^ { - 22 } \mathrm {~J}$ 
B)  $8.28 \times 10 ^ { - 22 } \mathrm {~J}$ 
C)  $12.4 \times 10 ^ { - 22 } \mathrm {~J}$ 
D)  $20.7 \times 10 ^ { - 22 } \mathrm {~J}$ 
E)  $37.3 \times 10 ^ { - 22 } \mathrm {~J}$ D

Question 4

A light-emitting diode (LED) emits light

Accepted Answer

A)  when forward-biased. 
B)  when reverse-biased. 
C)  only when it switches from forward to reverse bias. 
D)  continuously regardless of bias. 
A)  when forward-biased. 
B)  when reverse-biased. 
C)  only when it switches from forward to reverse bias. 
D)  continuously regardless of bias.

Question 5

A diode is operated in the reversed-biased mode. An increase in the bias voltage will

Accepted Answer

A)  increase the voltage across the device. 
B)  decrease the voltage across the device. 
C)  produce no appreciable change in the voltage across the device because the current is for all practical purposes zero. 
D)  produce no appreciable change in the voltage across the device. 
A)  increase the voltage across the device. 
B)  decrease the voltage across the device. 
C)  produce no appreciable change in the voltage across the device because the current is for all practical purposes zero. 
D)  produce no appreciable change in the voltage across the device.

Question 6

A n-type semiconductor is created by inserting

Accepted Answer

A)  donor impurities into the lattice of a pure semiconductor. 
B)  acceptor impurities into the lattice of a pure semiconductor. 
C)  both acceptor and donor impurities into a lattice of a semiconductor. 
D)  Hold on. None of the above answers is correct. 
A)  donor impurities into the lattice of a pure semiconductor. 
B)  acceptor impurities into the lattice of a pure semiconductor. 
C)  both acceptor and donor impurities into a lattice of a semiconductor. 
D)  Hold on. None of the above answers is correct.

Question 7

The Exclusion Principle states that

Accepted Answer

A)  no two quantum numbers can have the same value. 
B)  each stationary state consists of the quantum numbers n, l, m, and ms. 
C)  each stationary state of quantum numbers n, l, and m can be occupied by no more than two electrons. 
D)  each stationary state of quantum numbers n, l, m, and ms can be occupied by no more than two electrons. 
A)  no two quantum numbers can have the same value. 
B)  each stationary state consists of the quantum numbers n, l, m, and ms. 
C)  each stationary state of quantum numbers n, l, and m can be occupied by no more than two electrons. 
D)  each stationary state of quantum numbers n, l, m, and ms can be occupied by no more than two electrons.

Question 8

A p-type semiconductor is created by inserting

Accepted Answer

A)  donor impurities into the lattice of a pure semiconductor. 
B)  acceptor impurities into the lattice of a pure semiconductor. 
C)  both acceptor and donor impurities into a lattice of a semiconductor. 
D)  Hold on. None of the above answers is correct. 
A)  donor impurities into the lattice of a pure semiconductor. 
B)  acceptor impurities into the lattice of a pure semiconductor. 
C)  both acceptor and donor impurities into a lattice of a semiconductor. 
D)  Hold on. None of the above answers is correct.

Question 9

The measured vibrational frequency for a molecule is $3.5 \times 10 ^ { 13 } \mathrm {~Hz}$ . The energy difference between the vibrational states in the molecule is

Accepted Answer

A)  0.070 eV. 
B)  0.14 eV. 
C)  0.21 eV. 
D)  0.28 eV. 
A)  0.070 eV. 
B)  0.14 eV. 
C)  0.21 eV. 
D)  0.28 eV.

Question 10

In a p-type semiconductor

Accepted Answer

A)  the majority charge carriers are produced by donor impurities. 
B)  the majority charge carriers are produced by acceptor impurities. 
C)  there are equal numbers of donor and acceptor impurities. 
D)  no charge carriers present. 
A)  the majority charge carriers are produced by donor impurities. 
B)  the majority charge carriers are produced by acceptor impurities. 
C)  there are equal numbers of donor and acceptor impurities. 
D)  no charge carriers present.

Question 11

A diode and a 100- $\Omega$ resistor are connected in series with a 5.0-V power supply. The diode is connected so that it is forward-biased. The voltage drop across the diode is

Accepted Answer

A)  zero. 
B)  0.60 V. 
C)  4.4 V. 
D)  5.0 V. 
A)  zero. 
B)  0.60 V. 
C)  4.4 V. 
D)  5.0 V.

Question 12

The rotational energy level of a molecule is $8.5 \times 10 ^ { - 22 } \mathrm {~J}$ when J = 1. The moment of inertia of the molecule is ( $h = 1.054 \times 10 ^ { - 34 } \mathrm {~J} \cdot \mathrm { s }$ )

Accepted Answer

A)  $1.0 \times 10 ^ { - 47 } \mathrm {~kg} \cdot \mathrm { m } ^ { 2 }$ 
B)  $$1.3 \times 10 ^ { - 47 } \mathrm {~kg} \cdot \mathrm { m } ^ { 2 }$$ 
C)  $2.3 \times 10 ^ { - 47 } \mathrm {~kg} \cdot \mathrm { m } ^ { 2 }$ 
D)  $4.3 \times 10 ^ { - 47 } \mathrm {~kg} \cdot \mathrm { m } ^ { 2 }$ 
A)  $1.0 \times 10 ^ { - 47 } \mathrm {~kg} \cdot \mathrm { m } ^ { 2 }$ 
B)  $$1.3 \times 10 ^ { - 47 } \mathrm {~kg} \cdot \mathrm { m } ^ { 2 }$$ 
C)  $2.3 \times 10 ^ { - 47 } \mathrm {~kg} \cdot \mathrm { m } ^ { 2 }$ 
D)  $4.3 \times 10 ^ { - 47 } \mathrm {~kg} \cdot \mathrm { m } ^ { 2 }$

Question 13

The term bias refers to the

Accepted Answer

A)  ratio of the n-type to p-type material in the device. 
B)  amount of current the device is passing. 
C)  DC voltage applied to the device. 
D)  Hold on. None of the above answers is correct. 
A)  ratio of the n-type to p-type material in the device. 
B)  amount of current the device is passing. 
C)  DC voltage applied to the device. 
D)  Hold on. None of the above answers is correct.

Question 14

A diode and a 100- $\Omega$ resistor are connected in series with a 5.0-V power supply. The diode is connected so that it is forward-biased. The current through the circuit is

Accepted Answer

A)  zero. 
B)  12 mA. 
C)  44 mA. 
D)  50 mA. 
A)  zero. 
B)  12 mA. 
C)  44 mA. 
D)  50 mA.

Question 15

A diode and a 100- $\Omega$ resistor are connected in series with a 5.0-V power supply. The diode is connected so that it is reverse-biased. The voltage drop across the resistor is

Accepted Answer

A)  zero. 
B)  0.60 V. 
C)  4.4 V. 
D)  5.0 V. 
A)  zero. 
B)  0.60 V. 
C)  4.4 V. 
D)  5.0 V.

Question 16

The energy of a photon emitted from the n = 3 to the n = 1 state from a singly ionized helium atom is

Accepted Answer

A)  37.4 eV. 
B)  48.8 eV. 
C)  54.4 eV. 
D)  60.5 eV. 
A)  37.4 eV. 
B)  48.8 eV. 
C)  54.4 eV. 
D)  60.5 eV.

Question 17

The energy bands are completely filled in

Accepted Answer

A)  a conductor. 
B)  an insulator. 
C)  semiconductors at room temperature. 
D)  both insulators and cold semiconductors. 
A)  a conductor. 
B)  an insulator. 
C)  semiconductors at room temperature. 
D)  both insulators and cold semiconductors.

Question 18

The number of atomic states with principal quantum number n equal to 4 is

Accepted Answer

A)  16 
B)  32 
C)  60 
D)  64 
A)  16 
B)  32 
C)  60 
D)  64

Question 19

The number of atomic states with principal quantum number n less than or equal to 4 is

Accepted Answer

A)  16 
B)  32 
C)  60 
D)  64 
A)  16 
B)  32 
C)  60 
D)  64

Question 20

The energy required to remove the second electron from a singly ionized helium atom is

Accepted Answer

A)  13.6 eV. 
B)  27.2 eV. 
C)  40.8 eV. 
D)  54.4 eV. 
A)  13.6 eV. 
B)  27.2 eV. 
C)  40.8 eV. 
D)  54.4 eV.

Exam 39: Quantum Structure of Atoms, Molecules, and Solids

The base of an npn bipolar transistor is made of

The magnetic quantum number, m, can be related to

The rotational energy level of the HCl molecule is 4.14×10−22 J4.14 \times 10 ^ { - 22 } \mathrm {~J}4.14×10−22 J when J = 1. The amount of energy it must absorb to go to level J = 3 is

A light-emitting diode (LED) emits light

A diode is operated in the reversed-biased mode. An increase in the bias voltage will

A n-type semiconductor is created by inserting

The Exclusion Principle states that

A p-type semiconductor is created by inserting

The measured vibrational frequency for a molecule is 3.5×1013 Hz3.5 \times 10 ^ { 13 } \mathrm {~Hz}3.5×1013 Hz . The energy difference between the vibrational states in the molecule is

In a p-type semiconductor

A diode and a 100- Ω\OmegaΩ resistor are connected in series with a 5.0-V power supply. The diode is connected so that it is forward-biased. The voltage drop across the diode is

The rotational energy level of a molecule is 8.5×10−22 J8.5 \times 10 ^ { - 22 } \mathrm {~J}8.5×10−22 J when J = 1. The moment of inertia of the molecule is ( h=1.054×10−34 J⋅sh = 1.054 \times 10 ^ { - 34 } \mathrm {~J} \cdot \mathrm { s }h=1.054×10−34 J⋅s )

The term bias refers to the

A diode and a 100- Ω\OmegaΩ resistor are connected in series with a 5.0-V power supply. The diode is connected so that it is forward-biased. The current through the circuit is

A diode and a 100- Ω\OmegaΩ resistor are connected in series with a 5.0-V power supply. The diode is connected so that it is reverse-biased. The voltage drop across the resistor is

The energy of a photon emitted from the n = 3 to the n = 1 state from a singly ionized helium atom is

The energy bands are completely filled in

The number of atomic states with principal quantum number n equal to 4 is

The number of atomic states with principal quantum number n less than or equal to 4 is

The energy required to remove the second electron from a singly ionized helium atom is

Space, Time, and Mass

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