Giancoli's Physics: Principles with Applications, 7th Edition
29
Molecules and Solids
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29-1 to 29-3: Molecular Bonds
29-4: Molecular Spectra
29-5: Bonding in Solids
29-7: Band Theory of Solids
29-8: Semiconductors and Doping
29-9: Diodes
29-10: Transistors

Question by Giancoli, Douglas C., Physics: Principles with Applications, 7th Ed., ©2014, Reprinted by permission of Pearson Education Inc., New York.
Problem 32
Q
From Fig. 29–41, write an equation for the relationship between the base current ($I_B$), the collector current ($I_C$), and the emitter current ($I_E$), not labeled in Fig. 29–41). Assume $i_B = i_C = 0$.
Figure 29-41 An npn transistor used as an amplifier. $I_B$ is the current produced by $\xi_B$ (in the absence of a signal), $i_B$ is the ac signal current (= change in $I_B$).
A
$I_B + I_C = I_E$

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