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Question: 

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.
(a) A simple (half-wave) rectifier circuit using a semiconductor diode.

Figure 29-31 (a) A simple (half-wave) rectifier circuit using a semiconductor diode.

(b) AC source input voltage, and output voltage across R, as functions of time.

Figure 29-31 (b) AC source input voltage, and output voltage across R, as functions of time.

(a) Full-wave rectifier circuit (including a transformer so the magnitude of the voltage can be changed).

Figure 29-32 (a) Full-wave rectifier circuit (including a transformer so the magnitude of the voltage can be changed).

(b) Output voltage in the absence of capacitor C.

Figure 29-32 (b) Output voltage in the absence of capacitor C.

(c) Output voltage with the capacitor in the circuit.

Figure 29-32 (c) Output voltage with the capacitor in the circuit.

Source: Giancoli, Douglas C., Physics: Principles with Applications, 7th Edition, 2014.

Quick Answer: 
  1. $1.9 \textrm{ mA}$
  2. $3.9 \textrm{ mA}$

Giancoli 7th Edition, Chapter 29, Problem 28

(0:58)

Chapter 29, Problem 28 is solved.

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