Giancoli 7th Edition textbook cover
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 (IBI_B), the collector current (ICI_C), and the emitter current (IEI_E), not labeled in Fig. 29–41). Assume iB=iC=0i_B = i_C = 0.
An npn transistor used as an amplifier. I_B is the current produced by E_B (in the absence of a signal), i_B is the ac signal current (= change in I_B).
Figure 29-41 An npn transistor used as an amplifier. IBI_B is the current produced by ξB\xi_B (in the absence of a signal), iBi_B is the ac signal current (= change in IBI_B).
A
IB+IC=IEI_B + I_C = I_E
Giancoli 7th Edition, Chapter 29, Problem 32 solution video poster
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