Modified Mastering Physics without Pearson eText-- Instant Access -- for Physics for Scientists & Engineers with Modern Physics
5th Edition
ISBN: 9780134402659
Author: GIANCOLI, Douglas
Publisher: PEARSON
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Chapter 40, Problem 44P
To determine
Find the density of states of three-dimensional well.
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(a) For indium phosphide (InP) at room
temperature, calculate the electron and
hole mobilities for the following cases :
For intrinsic InP, the electrical
conductivity, the number of electrons
per cubic meter and the number
of holes
per cubic meter
are
2.5 x 10-6 (22m)¹, 3× 10¹3 m -3
and
3 x 1013 m3, respectively. Similarly, for
n-type extrinsic InP, the electrical
conductivity, the number of electrons
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per
3-6x 10-6 (2m), 4.5 × 10¹3-3
2 x 10¹3 m³, respectively.
are
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4-21. Consider a lattice of M equivalent noninteracting magnetic dipoles, u (associated,
say, with electron or nuclear spins). When placed in a magnetic field H, each dipole can orient
itself either in the same direction, ↑, or opposed to, t, the field. The energy of a dipole is -µH
if oriented with the field, and +µH if oriented against the field. Let N be the number of !
states and M – N the number of ↑ states. For a given value of N, the total energy is
µHN – µH(M – N)=(2N – M)µH
The total magnetic moment I is
I=(M -- 2N)µ
where Nis the average value of N for a given M, H, and T. The work necessary to increase H
by dH is -IdH. Find the specific heat C and the total magnetic moment for this system
Explain how the closely spaced energy levels for hydrogennear the top of Fig. 27–29 correspond to the closely spacedspectral lines at the top of Fig. 27–24.
Chapter 40 Solutions
Modified Mastering Physics without Pearson eText-- Instant Access -- for Physics for Scientists & Engineers with Modern Physics
Ch. 40 - What type of bond would you expect for (a) the N2...Ch. 40 - Describe how the molecule CaCl2 could be formed.Ch. 40 - Does the H2 molecule have a permanent dipole...Ch. 40 - Although the molecule H3 is not stable, the ion...Ch. 40 - The energy of a molecule can be divided into four...Ch. 40 - Would you expect the molecule H2+ to be stable? If...Ch. 40 - Explain why the carbon atom (Z = 6) usually forms...Ch. 40 - Prob. 1PCh. 40 - (II) The measured binding energy of KCl is 4.43eV....Ch. 40 - (I) Show that the quantity 2/I has units of...
Ch. 40 - Prob. 9PCh. 40 - Prob. 23PCh. 40 - Prob. 24PCh. 40 - Prob. 25PCh. 40 - Prob. 26PCh. 40 - Prob. 27PCh. 40 - Prob. 28PCh. 40 - Prob. 30PCh. 40 - Prob. 31PCh. 40 - Prob. 32PCh. 40 - Prob. 33PCh. 40 - Prob. 34PCh. 40 - Prob. 35PCh. 40 - Prob. 36PCh. 40 - Prob. 37PCh. 40 - Prob. 38PCh. 40 - Prob. 39PCh. 40 - Prob. 40PCh. 40 - Prob. 41PCh. 40 - Prob. 42PCh. 40 - Prob. 43PCh. 40 - Prob. 44P
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