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 28
Q

# An ac voltage of 120-V rms is to be rectified. Estimate very roughly the average current in the output resistor $R$ (= $31 \textrm{ k}\Omega$) for

1. a half-wave rectifier (Fig. 29–31),
2. a full-wave rectifier (Fig. 29–32) without capacitor.
Figure 29-31 (a) A simple (half-wave) rectifier circuit using a semiconductor diode.
Figure 29-31 (b) AC source input voltage, and output voltage across R, as functions of time.
Figure 29-32 (a) Full-wave rectifier circuit (including a transformer so the magnitude of the voltage can be changed).
Figure 29-32 (b) Output voltage in the absence of capacitor C.
Figure 29-32 (c) Output voltage with the capacitor in the circuit.
A
1. $1.9 \textrm{ mA}$
2. $3.9 \textrm{ mA}$

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